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Finding the Fourth Proportional to 39,479.60, 59,200.20 and 21,930.80

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Solution

The fourth proportional to 39,479.60, 59,200.20 and 21,930.80 is: 32,885.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,479.60 : 59,200.20 = 21,930.80 : x
  2. Step 2: Convert to fraction form
    39,479.60/59,200.20 = 21,930.80/x
  3. Step 3: Cross multiply
    39,479.60x = 59,200.20 × 21,930.80
  4. Step 4: Simplify right side
    39,479.60x = 1,298,307,746.16
  5. Step 5: Solve for x
    x = 1,298,307,746.16/39,479.60
  6. Step 6: Final answer
    x = 32,885.53

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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.