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Finding the Fourth Proportional to 38,476, 53,100.12 and 21,712.24

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Solution

The fourth proportional to 38,476, 53,100.12 and 21,712.24 is: 29,964.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,476 : 53,100.12 = 21,712.24 : x
  2. Step 2: Convert to fraction form
    38,476/53,100.12 = 21,712.24/x
  3. Step 3: Cross multiply
    38,476x = 53,100.12 × 21,712.24
  4. Step 4: Simplify right side
    38,476x = 1,152,922,549.47
  5. Step 5: Solve for x
    x = 1,152,922,549.47/38,476
  6. Step 6: Final answer
    x = 29,964.72

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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.