Home / 11,151.90-16,703.55-9,920.70

Finding the Fourth Proportional to 11,151.90, 16,703.55 and 9,920.70

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Solution

The fourth proportional to 11,151.90, 16,703.55 and 9,920.70 is: 14,859.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.90 : 16,703.55 = 9,920.70 : x
  2. Step 2: Convert to fraction form
    11,151.90/16,703.55 = 9,920.70/x
  3. Step 3: Cross multiply
    11,151.90x = 16,703.55 × 9,920.70
  4. Step 4: Simplify right side
    11,151.90x = 165,710,908.49
  5. Step 5: Solve for x
    x = 165,710,908.49/11,151.90
  6. Step 6: Final answer
    x = 14,859.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.