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Finding the Fourth Proportional to 12,838.70, 17,718.51 and 7,534.40

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Solution

The fourth proportional to 12,838.70, 17,718.51 and 7,534.40 is: 10,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,838.70 : 17,718.51 = 7,534.40 : x
  2. Step 2: Convert to fraction form
    12,838.70/17,718.51 = 7,534.40/x
  3. Step 3: Cross multiply
    12,838.70x = 17,718.51 × 7,534.40
  4. Step 4: Simplify right side
    12,838.70x = 133,498,341.74
  5. Step 5: Solve for x
    x = 133,498,341.74/12,838.70
  6. Step 6: Final answer
    x = 10,398.12

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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.