Home / 21,470.31-29,637.09-12,520.62

Finding the Fourth Proportional to 21,470.31, 29,637.09 and 12,520.62

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Solution

The fourth proportional to 21,470.31, 29,637.09 and 12,520.62 is: 17,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.31 : 29,637.09 = 12,520.62 : x
  2. Step 2: Convert to fraction form
    21,470.31/29,637.09 = 12,520.62/x
  3. Step 3: Cross multiply
    21,470.31x = 29,637.09 × 12,520.62
  4. Step 4: Simplify right side
    21,470.31x = 371,074,741.80
  5. Step 5: Solve for x
    x = 371,074,741.80/21,470.31
  6. Step 6: Final answer
    x = 17,283.16

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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.