Home / 10,901.80-16,360.98-7,987.72

Finding the Fourth Proportional to 10,901.80, 16,360.98 and 7,987.72

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Solution

The fourth proportional to 10,901.80, 16,360.98 and 7,987.72 is: 11,987.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,901.80 : 16,360.98 = 7,987.72 : x
  2. Step 2: Convert to fraction form
    10,901.80/16,360.98 = 7,987.72/x
  3. Step 3: Cross multiply
    10,901.80x = 16,360.98 × 7,987.72
  4. Step 4: Simplify right side
    10,901.80x = 130,686,927.17
  5. Step 5: Solve for x
    x = 130,686,927.17/10,901.80
  6. Step 6: Final answer
    x = 11,987.65

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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.