Home / 20,544.60-28,352.40-12,988.20

Finding the Fourth Proportional to 20,544.60, 28,352.40 and 12,988.20

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Solution

The fourth proportional to 20,544.60, 28,352.40 and 12,988.20 is: 17,924.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,544.60 : 28,352.40 = 12,988.20 : x
  2. Step 2: Convert to fraction form
    20,544.60/28,352.40 = 12,988.20/x
  3. Step 3: Cross multiply
    20,544.60x = 28,352.40 × 12,988.20
  4. Step 4: Simplify right side
    20,544.60x = 368,246,641.68
  5. Step 5: Solve for x
    x = 368,246,641.68/20,544.60
  6. Step 6: Final answer
    x = 17,924.25

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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.