Home / 20,580.50-30,870.77-7,432.90

Finding the Fourth Proportional to 20,580.50, 30,870.77 and 7,432.90

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Solution

The fourth proportional to 20,580.50, 30,870.77 and 7,432.90 is: 11,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.50 : 30,870.77 = 7,432.90 : x
  2. Step 2: Convert to fraction form
    20,580.50/30,870.77 = 7,432.90/x
  3. Step 3: Cross multiply
    20,580.50x = 30,870.77 × 7,432.90
  4. Step 4: Simplify right side
    20,580.50x = 229,459,231.99
  5. Step 5: Solve for x
    x = 229,459,231.99/20,580.50
  6. Step 6: Final answer
    x = 11,149.35

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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.