Home / 20,539.44-28,340.28-12,988.08

Finding the Fourth Proportional to 20,539.44, 28,340.28 and 12,988.08

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Solution

The fourth proportional to 20,539.44, 28,340.28 and 12,988.08 is: 17,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.44 : 28,340.28 = 12,988.08 : x
  2. Step 2: Convert to fraction form
    20,539.44/28,340.28 = 12,988.08/x
  3. Step 3: Cross multiply
    20,539.44x = 28,340.28 × 12,988.08
  4. Step 4: Simplify right side
    20,539.44x = 368,085,823.86
  5. Step 5: Solve for x
    x = 368,085,823.86/20,539.44
  6. Step 6: Final answer
    x = 17,920.93

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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.