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Finding the Fourth Proportional to 15,477, 21,358.64 and 9,505.28

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Solution

The fourth proportional to 15,477, 21,358.64 and 9,505.28 is: 13,117.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,477 : 21,358.64 = 9,505.28 : x
  2. Step 2: Convert to fraction form
    15,477/21,358.64 = 9,505.28/x
  3. Step 3: Cross multiply
    15,477x = 21,358.64 × 9,505.28
  4. Step 4: Simplify right side
    15,477x = 203,019,853.62
  5. Step 5: Solve for x
    x = 203,019,853.62/15,477
  6. Step 6: Final answer
    x = 13,117.52

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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.