Home / 28,281.60-42,422.40-21,740.80

Finding the Fourth Proportional to 28,281.60, 42,422.40 and 21,740.80

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Solution

The fourth proportional to 28,281.60, 42,422.40 and 21,740.80 is: 32,611.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.60 : 42,422.40 = 21,740.80 : x
  2. Step 2: Convert to fraction form
    28,281.60/42,422.40 = 21,740.80/x
  3. Step 3: Cross multiply
    28,281.60x = 42,422.40 × 21,740.80
  4. Step 4: Simplify right side
    28,281.60x = 922,296,913.92
  5. Step 5: Solve for x
    x = 922,296,913.92/28,281.60
  6. Step 6: Final answer
    x = 32,611.20

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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.