Home / 9,117.88-12,582.36-5,138.76

Finding the Fourth Proportional to 9,117.88, 12,582.36 and 5,138.76

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Solution

The fourth proportional to 9,117.88, 12,582.36 and 5,138.76 is: 7,091.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117.88 : 12,582.36 = 5,138.76 : x
  2. Step 2: Convert to fraction form
    9,117.88/12,582.36 = 5,138.76/x
  3. Step 3: Cross multiply
    9,117.88x = 12,582.36 × 5,138.76
  4. Step 4: Simplify right side
    9,117.88x = 64,657,728.27
  5. Step 5: Solve for x
    x = 64,657,728.27/9,117.88
  6. Step 6: Final answer
    x = 7,091.31

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Half scale
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Double scale
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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.