Home / 13,780.20-20,670.30-8,859.45

Finding the Fourth Proportional to 13,780.20, 20,670.30 and 8,859.45

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Solution

The fourth proportional to 13,780.20, 20,670.30 and 8,859.45 is: 13,289.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.20 : 20,670.30 = 8,859.45 : x
  2. Step 2: Convert to fraction form
    13,780.20/20,670.30 = 8,859.45/x
  3. Step 3: Cross multiply
    13,780.20x = 20,670.30 × 8,859.45
  4. Step 4: Simplify right side
    13,780.20x = 183,127,489.34
  5. Step 5: Solve for x
    x = 183,127,489.34/13,780.20
  6. Step 6: Final answer
    x = 13,289.18

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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.