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Finding the Fourth Proportional to 15,124.71, 20,870.91 and 8,409.93

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Solution

The fourth proportional to 15,124.71, 20,870.91 and 8,409.93 is: 11,605.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,124.71 : 20,870.91 = 8,409.93 : x
  2. Step 2: Convert to fraction form
    15,124.71/20,870.91 = 8,409.93/x
  3. Step 3: Cross multiply
    15,124.71x = 20,870.91 × 8,409.93
  4. Step 4: Simplify right side
    15,124.71x = 175,522,892.14
  5. Step 5: Solve for x
    x = 175,522,892.14/15,124.71
  6. Step 6: Final answer
    x = 11,605.04

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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.