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Finding the Fourth Proportional to 29,356.95, 40,512.68 and 15,928.32

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Solution

The fourth proportional to 29,356.95, 40,512.68 and 15,928.32 is: 21,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,356.95 : 40,512.68 = 15,928.32 : x
  2. Step 2: Convert to fraction form
    29,356.95/40,512.68 = 15,928.32/x
  3. Step 3: Cross multiply
    29,356.95x = 40,512.68 × 15,928.32
  4. Step 4: Simplify right side
    29,356.95x = 645,298,851.46
  5. Step 5: Solve for x
    x = 645,298,851.46/29,356.95
  6. Step 6: Final answer
    x = 21,981.13

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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.