Home / 29,280.79-40,407.21-15,851.70

Finding the Fourth Proportional to 29,280.79, 40,407.21 and 15,851.70

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Solution

The fourth proportional to 29,280.79, 40,407.21 and 15,851.70 is: 21,875.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,280.79 : 40,407.21 = 15,851.70 : x
  2. Step 2: Convert to fraction form
    29,280.79/40,407.21 = 15,851.70/x
  3. Step 3: Cross multiply
    29,280.79x = 40,407.21 × 15,851.70
  4. Step 4: Simplify right side
    29,280.79x = 640,522,970.76
  5. Step 5: Solve for x
    x = 640,522,970.76/29,280.79
  6. Step 6: Final answer
    x = 21,875.19

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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.