Home / 10,985.40-15,158.88-6,508.38

Finding the Fourth Proportional to 10,985.40, 15,158.88 and 6,508.38

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Solution

The fourth proportional to 10,985.40, 15,158.88 and 6,508.38 is: 8,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.40 : 15,158.88 = 6,508.38 : x
  2. Step 2: Convert to fraction form
    10,985.40/15,158.88 = 6,508.38/x
  3. Step 3: Cross multiply
    10,985.40x = 15,158.88 × 6,508.38
  4. Step 4: Simplify right side
    10,985.40x = 98,659,751.41
  5. Step 5: Solve for x
    x = 98,659,751.41/10,985.40
  6. Step 6: Final answer
    x = 8,980.99

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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.