Home / 38,987.60-58,438.20-20,260.40

Finding the Fourth Proportional to 38,987.60, 58,438.20 and 20,260.40

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Solution

The fourth proportional to 38,987.60, 58,438.20 and 20,260.40 is: 30,368.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.60 : 58,438.20 = 20,260.40 : x
  2. Step 2: Convert to fraction form
    38,987.60/58,438.20 = 20,260.40/x
  3. Step 3: Cross multiply
    38,987.60x = 58,438.20 × 20,260.40
  4. Step 4: Simplify right side
    38,987.60x = 1,183,981,307.28
  5. Step 5: Solve for x
    x = 1,183,981,307.28/38,987.60
  6. Step 6: Final answer
    x = 30,368.15

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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.