Home / 15,430.03-21,293.28-8,715.63

Finding the Fourth Proportional to 15,430.03, 21,293.28 and 8,715.63

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Solution

The fourth proportional to 15,430.03, 21,293.28 and 8,715.63 is: 12,027.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.03 : 21,293.28 = 8,715.63 : x
  2. Step 2: Convert to fraction form
    15,430.03/21,293.28 = 8,715.63/x
  3. Step 3: Cross multiply
    15,430.03x = 21,293.28 × 8,715.63
  4. Step 4: Simplify right side
    15,430.03x = 185,584,429.82
  5. Step 5: Solve for x
    x = 185,584,429.82/15,430.03
  6. Step 6: Final answer
    x = 12,027.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.