Home / 10,987.82-15,165.12-6,513.11

Finding the Fourth Proportional to 10,987.82, 15,165.12 and 6,513.11

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Solution

The fourth proportional to 10,987.82, 15,165.12 and 6,513.11 is: 8,989.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,987.82 : 15,165.12 = 6,513.11 : x
  2. Step 2: Convert to fraction form
    10,987.82/15,165.12 = 6,513.11/x
  3. Step 3: Cross multiply
    10,987.82x = 15,165.12 × 6,513.11
  4. Step 4: Simplify right side
    10,987.82x = 98,772,100.19
  5. Step 5: Solve for x
    x = 98,772,100.19/10,987.82
  6. Step 6: Final answer
    x = 8,989.24

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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.