Home / 10,117.15-13,959.98-5,639.92

Finding the Fourth Proportional to 10,117.15, 13,959.98 and 5,639.92

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Solution

The fourth proportional to 10,117.15, 13,959.98 and 5,639.92 is: 7,782.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,117.15 : 13,959.98 = 5,639.92 : x
  2. Step 2: Convert to fraction form
    10,117.15/13,959.98 = 5,639.92/x
  3. Step 3: Cross multiply
    10,117.15x = 13,959.98 × 5,639.92
  4. Step 4: Simplify right side
    10,117.15x = 78,733,142.20
  5. Step 5: Solve for x
    x = 78,733,142.20/10,117.15
  6. Step 6: Final answer
    x = 7,782.15

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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.