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Finding the Fourth Proportional to 18,487.65, 25,507.13 and 10,529.40

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Solution

The fourth proportional to 18,487.65, 25,507.13 and 10,529.40 is: 14,527.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.65 : 25,507.13 = 10,529.40 : x
  2. Step 2: Convert to fraction form
    18,487.65/25,507.13 = 10,529.40/x
  3. Step 3: Cross multiply
    18,487.65x = 25,507.13 × 10,529.40
  4. Step 4: Simplify right side
    18,487.65x = 268,574,721.98
  5. Step 5: Solve for x
    x = 268,574,721.98/18,487.65
  6. Step 6: Final answer
    x = 14,527.25

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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.