Home / 25,590.80-38,321.40-18,981.20

Finding the Fourth Proportional to 25,590.80, 38,321.40 and 18,981.20

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Solution

The fourth proportional to 25,590.80, 38,321.40 and 18,981.20 is: 28,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,590.80 : 38,321.40 = 18,981.20 : x
  2. Step 2: Convert to fraction form
    25,590.80/38,321.40 = 18,981.20/x
  3. Step 3: Cross multiply
    25,590.80x = 38,321.40 × 18,981.20
  4. Step 4: Simplify right side
    25,590.80x = 727,386,157.68
  5. Step 5: Solve for x
    x = 727,386,157.68/25,590.80
  6. Step 6: Final answer
    x = 28,423.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.