Home / 38,507.81-53,139.11-21,511.98

Finding the Fourth Proportional to 38,507.81, 53,139.11 and 21,511.98

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Solution

The fourth proportional to 38,507.81, 53,139.11 and 21,511.98 is: 29,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,507.81 : 53,139.11 = 21,511.98 : x
  2. Step 2: Convert to fraction form
    38,507.81/53,139.11 = 21,511.98/x
  3. Step 3: Cross multiply
    38,507.81x = 53,139.11 × 21,511.98
  4. Step 4: Simplify right side
    38,507.81x = 1,143,127,363.98
  5. Step 5: Solve for x
    x = 1,143,127,363.98/38,507.81
  6. Step 6: Final answer
    x = 29,685.60

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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.