Home / 13,077.20-18,045.19-7,770.99

Finding the Fourth Proportional to 13,077.20, 18,045.19 and 7,770.99

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Solution

The fourth proportional to 13,077.20, 18,045.19 and 7,770.99 is: 10,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,077.20 : 18,045.19 = 7,770.99 : x
  2. Step 2: Convert to fraction form
    13,077.20/18,045.19 = 7,770.99/x
  3. Step 3: Cross multiply
    13,077.20x = 18,045.19 × 7,770.99
  4. Step 4: Simplify right side
    13,077.20x = 140,228,971.61
  5. Step 5: Solve for x
    x = 140,228,971.61/13,077.20
  6. Step 6: Final answer
    x = 10,723.16

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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.