Home / 39,290.14-54,221.55-21,386.30

Finding the Fourth Proportional to 39,290.14, 54,221.55 and 21,386.30

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Solution

The fourth proportional to 39,290.14, 54,221.55 and 21,386.30 is: 29,513.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.14 : 54,221.55 = 21,386.30 : x
  2. Step 2: Convert to fraction form
    39,290.14/54,221.55 = 21,386.30/x
  3. Step 3: Cross multiply
    39,290.14x = 54,221.55 × 21,386.30
  4. Step 4: Simplify right side
    39,290.14x = 1,159,598,334.77
  5. Step 5: Solve for x
    x = 1,159,598,334.77/39,290.14
  6. Step 6: Final answer
    x = 29,513.72

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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.