Home / 13,117.08-18,101.66-7,148.90

Finding the Fourth Proportional to 13,117.08, 18,101.66 and 7,148.90

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Solution

The fourth proportional to 13,117.08, 18,101.66 and 7,148.90 is: 9,865.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.08 : 18,101.66 = 7,148.90 : x
  2. Step 2: Convert to fraction form
    13,117.08/18,101.66 = 7,148.90/x
  3. Step 3: Cross multiply
    13,117.08x = 18,101.66 × 7,148.90
  4. Step 4: Simplify right side
    13,117.08x = 129,406,957.17
  5. Step 5: Solve for x
    x = 129,406,957.17/13,117.08
  6. Step 6: Final answer
    x = 9,865.53

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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.