Home / 28,184.55-38,895.10-15,438.90

Finding the Fourth Proportional to 28,184.55, 38,895.10 and 15,438.90

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Solution

The fourth proportional to 28,184.55, 38,895.10 and 15,438.90 is: 21,305.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,184.55 : 38,895.10 = 15,438.90 : x
  2. Step 2: Convert to fraction form
    28,184.55/38,895.10 = 15,438.90/x
  3. Step 3: Cross multiply
    28,184.55x = 38,895.10 × 15,438.90
  4. Step 4: Simplify right side
    28,184.55x = 600,497,666.65
  5. Step 5: Solve for x
    x = 600,497,666.65/28,184.55
  6. Step 6: Final answer
    x = 21,305.92

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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.