Home / 10,895.70-15,031.08-7,117.86

Finding the Fourth Proportional to 10,895.70, 15,031.08 and 7,117.86

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Solution

The fourth proportional to 10,895.70, 15,031.08 and 7,117.86 is: 9,819.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,895.70 : 15,031.08 = 7,117.86 : x
  2. Step 2: Convert to fraction form
    10,895.70/15,031.08 = 7,117.86/x
  3. Step 3: Cross multiply
    10,895.70x = 15,031.08 × 7,117.86
  4. Step 4: Simplify right side
    10,895.70x = 106,989,123.09
  5. Step 5: Solve for x
    x = 106,989,123.09/10,895.70
  6. Step 6: Final answer
    x = 9,819.39

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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.