Home / 38,700.90-53,406.65-21,705.14

Finding the Fourth Proportional to 38,700.90, 53,406.65 and 21,705.14

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Solution

The fourth proportional to 38,700.90, 53,406.65 and 21,705.14 is: 29,952.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,700.90 : 53,406.65 = 21,705.14 : x
  2. Step 2: Convert to fraction form
    38,700.90/53,406.65 = 21,705.14/x
  3. Step 3: Cross multiply
    38,700.90x = 53,406.65 × 21,705.14
  4. Step 4: Simplify right side
    38,700.90x = 1,159,198,815.18
  5. Step 5: Solve for x
    x = 1,159,198,815.18/38,700.90
  6. Step 6: Final answer
    x = 29,952.76

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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.