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Finding the Fourth Proportional to 13,354.32, 18,428.88 and 7,385.88

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Solution

The fourth proportional to 13,354.32, 18,428.88 and 7,385.88 is: 10,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,354.32 : 18,428.88 = 7,385.88 : x
  2. Step 2: Convert to fraction form
    13,354.32/18,428.88 = 7,385.88/x
  3. Step 3: Cross multiply
    13,354.32x = 18,428.88 × 7,385.88
  4. Step 4: Simplify right side
    13,354.32x = 136,113,496.21
  5. Step 5: Solve for x
    x = 136,113,496.21/13,354.32
  6. Step 6: Final answer
    x = 10,192.47

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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.