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Finding the Fourth Proportional to 14,352, 21,451 and 12,943.20

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Solution

The fourth proportional to 14,352, 21,451 and 12,943.20 is: 19,345.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,352 : 21,451 = 12,943.20 : x
  2. Step 2: Convert to fraction form
    14,352/21,451 = 12,943.20/x
  3. Step 3: Cross multiply
    14,352x = 21,451 × 12,943.20
  4. Step 4: Simplify right side
    14,352x = 277,644,583.20
  5. Step 5: Solve for x
    x = 277,644,583.20/14,352
  6. Step 6: Final answer
    x = 19,345.36

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Double scale
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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.