Home / 15,087.12-20,834.24-9,718.90

Finding the Fourth Proportional to 15,087.12, 20,834.24 and 9,718.90

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Solution

The fourth proportional to 15,087.12, 20,834.24 and 9,718.90 is: 13,421.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.12 : 20,834.24 = 9,718.90 : x
  2. Step 2: Convert to fraction form
    15,087.12/20,834.24 = 9,718.90/x
  3. Step 3: Cross multiply
    15,087.12x = 20,834.24 × 9,718.90
  4. Step 4: Simplify right side
    15,087.12x = 202,485,895.14
  5. Step 5: Solve for x
    x = 202,485,895.14/15,087.12
  6. Step 6: Final answer
    x = 13,421.11

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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.