Home / 15,421.45-21,281.57-8,347.85

Finding the Fourth Proportional to 15,421.45, 21,281.57 and 8,347.85

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Solution

The fourth proportional to 15,421.45, 21,281.57 and 8,347.85 is: 11,520.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.45 : 21,281.57 = 8,347.85 : x
  2. Step 2: Convert to fraction form
    15,421.45/21,281.57 = 8,347.85/x
  3. Step 3: Cross multiply
    15,421.45x = 21,281.57 × 8,347.85
  4. Step 4: Simplify right side
    15,421.45x = 177,655,354.12
  5. Step 5: Solve for x
    x = 177,655,354.12/15,421.45
  6. Step 6: Final answer
    x = 11,520.02

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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.