Home / 10,071.18-15,108.31-5,138.13

Finding the Fourth Proportional to 10,071.18, 15,108.31 and 5,138.13

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Solution

The fourth proportional to 10,071.18, 15,108.31 and 5,138.13 is: 7,707.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,071.18 : 15,108.31 = 5,138.13 : x
  2. Step 2: Convert to fraction form
    10,071.18/15,108.31 = 5,138.13/x
  3. Step 3: Cross multiply
    10,071.18x = 15,108.31 × 5,138.13
  4. Step 4: Simplify right side
    10,071.18x = 77,628,460.86
  5. Step 5: Solve for x
    x = 77,628,460.86/10,071.18
  6. Step 6: Final answer
    x = 7,707.98

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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.