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Finding the Fourth Proportional to 18,487.19, 25,509.39 and 10,529.57

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Solution

The fourth proportional to 18,487.19, 25,509.39 and 10,529.57 is: 14,529.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.19 : 25,509.39 = 10,529.57 : x
  2. Step 2: Convert to fraction form
    18,487.19/25,509.39 = 10,529.57/x
  3. Step 3: Cross multiply
    18,487.19x = 25,509.39 × 10,529.57
  4. Step 4: Simplify right side
    18,487.19x = 268,602,907.66
  5. Step 5: Solve for x
    x = 268,602,907.66/18,487.19
  6. Step 6: Final answer
    x = 14,529.14

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Half scale
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Double scale
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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.