Home / 28,378.72-39,159.20-16,278.57

Finding the Fourth Proportional to 28,378.72, 39,159.20 and 16,278.57

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Solution

The fourth proportional to 28,378.72, 39,159.20 and 16,278.57 is: 22,462.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.72 : 39,159.20 = 16,278.57 : x
  2. Step 2: Convert to fraction form
    28,378.72/39,159.20 = 16,278.57/x
  3. Step 3: Cross multiply
    28,378.72x = 39,159.20 × 16,278.57
  4. Step 4: Simplify right side
    28,378.72x = 637,455,778.34
  5. Step 5: Solve for x
    x = 637,455,778.34/28,378.72
  6. Step 6: Final answer
    x = 22,462.46

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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.