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Finding the Fourth Proportional to 15,125.79, 20,873.93 and 8,411.17

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Solution

The fourth proportional to 15,125.79, 20,873.93 and 8,411.17 is: 11,607.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.79 : 20,873.93 = 8,411.17 : x
  2. Step 2: Convert to fraction form
    15,125.79/20,873.93 = 8,411.17/x
  3. Step 3: Cross multiply
    15,125.79x = 20,873.93 × 8,411.17
  4. Step 4: Simplify right side
    15,125.79x = 175,574,083.64
  5. Step 5: Solve for x
    x = 175,574,083.64/15,125.79
  6. Step 6: Final answer
    x = 11,607.60

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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.