Home / 15,318.03-21,138.75-8,603.76

Finding the Fourth Proportional to 15,318.03, 21,138.75 and 8,603.76

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Solution

The fourth proportional to 15,318.03, 21,138.75 and 8,603.76 is: 11,873.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.03 : 21,138.75 = 8,603.76 : x
  2. Step 2: Convert to fraction form
    15,318.03/21,138.75 = 8,603.76/x
  3. Step 3: Cross multiply
    15,318.03x = 21,138.75 × 8,603.76
  4. Step 4: Simplify right side
    15,318.03x = 181,872,731.70
  5. Step 5: Solve for x
    x = 181,872,731.70/15,318.03
  6. Step 6: Final answer
    x = 11,873.11

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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.