Home / 15,381.30-21,226.20-8,307.72

Finding the Fourth Proportional to 15,381.30, 21,226.20 and 8,307.72

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Solution

The fourth proportional to 15,381.30, 21,226.20 and 8,307.72 is: 11,464.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,381.30 : 21,226.20 = 8,307.72 : x
  2. Step 2: Convert to fraction form
    15,381.30/21,226.20 = 8,307.72/x
  3. Step 3: Cross multiply
    15,381.30x = 21,226.20 × 8,307.72
  4. Step 4: Simplify right side
    15,381.30x = 176,341,326.26
  5. Step 5: Solve for x
    x = 176,341,326.26/15,381.30
  6. Step 6: Final answer
    x = 11,464.66

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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.