Home / 39,290.72-54,219.52-21,385.76

Finding the Fourth Proportional to 39,290.72, 54,219.52 and 21,385.76

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Solution

The fourth proportional to 39,290.72, 54,219.52 and 21,385.76 is: 29,511.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.72 : 54,219.52 = 21,385.76 : x
  2. Step 2: Convert to fraction form
    39,290.72/54,219.52 = 21,385.76/x
  3. Step 3: Cross multiply
    39,290.72x = 54,219.52 × 21,385.76
  4. Step 4: Simplify right side
    39,290.72x = 1,159,525,642.04
  5. Step 5: Solve for x
    x = 1,159,525,642.04/39,290.72
  6. Step 6: Final answer
    x = 29,511.44

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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.