Home / 9,139.68-12,612.54-5,160.66

Finding the Fourth Proportional to 9,139.68, 12,612.54 and 5,160.66

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Solution

The fourth proportional to 9,139.68, 12,612.54 and 5,160.66 is: 7,121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.68 : 12,612.54 = 5,160.66 : x
  2. Step 2: Convert to fraction form
    9,139.68/12,612.54 = 5,160.66/x
  3. Step 3: Cross multiply
    9,139.68x = 12,612.54 × 5,160.66
  4. Step 4: Simplify right side
    9,139.68x = 65,089,030.68
  5. Step 5: Solve for x
    x = 65,089,030.68/9,139.68
  6. Step 6: Final answer
    x = 7,121.59

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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.