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Finding the Fourth Proportional to 10,458.71, 15,612.82 and 8,961.81

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Solution

The fourth proportional to 10,458.71, 15,612.82 and 8,961.81 is: 13,378.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,458.71 : 15,612.82 = 8,961.81 : x
  2. Step 2: Convert to fraction form
    10,458.71/15,612.82 = 8,961.81/x
  3. Step 3: Cross multiply
    10,458.71x = 15,612.82 × 8,961.81
  4. Step 4: Simplify right side
    10,458.71x = 139,919,126.40
  5. Step 5: Solve for x
    x = 139,919,126.40/10,458.71
  6. Step 6: Final answer
    x = 13,378.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.