Home / 8,920.23-12,316.91-7,159.69

Finding the Fourth Proportional to 8,920.23, 12,316.91 and 7,159.69

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Solution

The fourth proportional to 8,920.23, 12,316.91 and 7,159.69 is: 9,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.23 : 12,316.91 = 7,159.69 : x
  2. Step 2: Convert to fraction form
    8,920.23/12,316.91 = 7,159.69/x
  3. Step 3: Cross multiply
    8,920.23x = 12,316.91 × 7,159.69
  4. Step 4: Simplify right side
    8,920.23x = 88,185,277.23
  5. Step 5: Solve for x
    x = 88,185,277.23/8,920.23
  6. Step 6: Final answer
    x = 9,885.99

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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.