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Finding the Fourth Proportional to 38,647.68, 53,333.68 and 21,421.14

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Solution

The fourth proportional to 38,647.68, 53,333.68 and 21,421.14 is: 29,561.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,647.68 : 53,333.68 = 21,421.14 : x
  2. Step 2: Convert to fraction form
    38,647.68/53,333.68 = 21,421.14/x
  3. Step 3: Cross multiply
    38,647.68x = 53,333.68 × 21,421.14
  4. Step 4: Simplify right side
    38,647.68x = 1,142,468,226.00
  5. Step 5: Solve for x
    x = 1,142,468,226.00/38,647.68
  6. Step 6: Final answer
    x = 29,561.11

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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.