Home / 10,935.90-15,085.80-8,278.70

Finding the Fourth Proportional to 10,935.90, 15,085.80 and 8,278.70

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Solution

The fourth proportional to 10,935.90, 15,085.80 and 8,278.70 is: 11,420.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,935.90 : 15,085.80 = 8,278.70 : x
  2. Step 2: Convert to fraction form
    10,935.90/15,085.80 = 8,278.70/x
  3. Step 3: Cross multiply
    10,935.90x = 15,085.80 × 8,278.70
  4. Step 4: Simplify right side
    10,935.90x = 124,890,737.03
  5. Step 5: Solve for x
    x = 124,890,737.03/10,935.90
  6. Step 6: Final answer
    x = 11,420.25

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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.