Home / 20,988.06-31,482.15-8,508.32

Finding the Fourth Proportional to 20,988.06, 31,482.15 and 8,508.32

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Solution

The fourth proportional to 20,988.06, 31,482.15 and 8,508.32 is: 12,762.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.06 : 31,482.15 = 8,508.32 : x
  2. Step 2: Convert to fraction form
    20,988.06/31,482.15 = 8,508.32/x
  3. Step 3: Cross multiply
    20,988.06x = 31,482.15 × 8,508.32
  4. Step 4: Simplify right side
    20,988.06x = 267,860,206.49
  5. Step 5: Solve for x
    x = 267,860,206.49/20,988.06
  6. Step 6: Final answer
    x = 12,762.50

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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.