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Finding the Fourth Proportional to 15,524, 21,424.40 and 8,901.28

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Solution

The fourth proportional to 15,524, 21,424.40 and 8,901.28 is: 12,284.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,524 : 21,424.40 = 8,901.28 : x
  2. Step 2: Convert to fraction form
    15,524/21,424.40 = 8,901.28/x
  3. Step 3: Cross multiply
    15,524x = 21,424.40 × 8,901.28
  4. Step 4: Simplify right side
    15,524x = 190,704,583.23
  5. Step 5: Solve for x
    x = 190,704,583.23/15,524
  6. Step 6: Final answer
    x = 12,284.50

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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.