Home / 15,443.61-21,313.34-8,638.21

Finding the Fourth Proportional to 15,443.61, 21,313.34 and 8,638.21

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Solution

The fourth proportional to 15,443.61, 21,313.34 and 8,638.21 is: 11,921.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,443.61 : 21,313.34 = 8,638.21 : x
  2. Step 2: Convert to fraction form
    15,443.61/21,313.34 = 8,638.21/x
  3. Step 3: Cross multiply
    15,443.61x = 21,313.34 × 8,638.21
  4. Step 4: Simplify right side
    15,443.61x = 184,109,106.72
  5. Step 5: Solve for x
    x = 184,109,106.72/15,443.61
  6. Step 6: Final answer
    x = 11,921.38

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Half scale
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Double scale
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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.