Home / 18,987.32-28,491.26-7,901.64

Finding the Fourth Proportional to 18,987.32, 28,491.26 and 7,901.64

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Solution

The fourth proportional to 18,987.32, 28,491.26 and 7,901.64 is: 11,856.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.32 : 28,491.26 = 7,901.64 : x
  2. Step 2: Convert to fraction form
    18,987.32/28,491.26 = 7,901.64/x
  3. Step 3: Cross multiply
    18,987.32x = 28,491.26 × 7,901.64
  4. Step 4: Simplify right side
    18,987.32x = 225,127,679.67
  5. Step 5: Solve for x
    x = 225,127,679.67/18,987.32
  6. Step 6: Final answer
    x = 11,856.74

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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.