Home / 15,637.47-21,580.92-8,921.55

Finding the Fourth Proportional to 15,637.47, 21,580.92 and 8,921.55

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Solution

The fourth proportional to 15,637.47, 21,580.92 and 8,921.55 is: 12,312.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,637.47 : 21,580.92 = 8,921.55 : x
  2. Step 2: Convert to fraction form
    15,637.47/21,580.92 = 8,921.55/x
  3. Step 3: Cross multiply
    15,637.47x = 21,580.92 × 8,921.55
  4. Step 4: Simplify right side
    15,637.47x = 192,535,256.83
  5. Step 5: Solve for x
    x = 192,535,256.83/15,637.47
  6. Step 6: Final answer
    x = 12,312.43

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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.