Home / 39,702.12-54,790.34-21,798.50

Finding the Fourth Proportional to 39,702.12, 54,790.34 and 21,798.50

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Solution

The fourth proportional to 39,702.12, 54,790.34 and 21,798.50 is: 30,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,702.12 : 54,790.34 = 21,798.50 : x
  2. Step 2: Convert to fraction form
    39,702.12/54,790.34 = 21,798.50/x
  3. Step 3: Cross multiply
    39,702.12x = 54,790.34 × 21,798.50
  4. Step 4: Simplify right side
    39,702.12x = 1,194,346,843.55
  5. Step 5: Solve for x
    x = 1,194,346,843.55/39,702.12
  6. Step 6: Final answer
    x = 30,082.70

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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.