Home / 11,143.20-15,381-6,430.56

Finding the Fourth Proportional to 11,143.20, 15,381 and 6,430.56

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Solution

The fourth proportional to 11,143.20, 15,381 and 6,430.56 is: 8,876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,143.20 : 15,381 = 6,430.56 : x
  2. Step 2: Convert to fraction form
    11,143.20/15,381 = 6,430.56/x
  3. Step 3: Cross multiply
    11,143.20x = 15,381 × 6,430.56
  4. Step 4: Simplify right side
    11,143.20x = 98,908,443.36
  5. Step 5: Solve for x
    x = 98,908,443.36/11,143.20
  6. Step 6: Final answer
    x = 8,876.13

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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.