Home / 15,430.30-21,293.82-8,356.72

Finding the Fourth Proportional to 15,430.30, 21,293.82 and 8,356.72

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Solution

The fourth proportional to 15,430.30, 21,293.82 and 8,356.72 is: 11,532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.30 : 21,293.82 = 8,356.72 : x
  2. Step 2: Convert to fraction form
    15,430.30/21,293.82 = 8,356.72/x
  3. Step 3: Cross multiply
    15,430.30x = 21,293.82 × 8,356.72
  4. Step 4: Simplify right side
    15,430.30x = 177,946,491.47
  5. Step 5: Solve for x
    x = 177,946,491.47/15,430.30
  6. Step 6: Final answer
    x = 11,532.28

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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.