Home / 28,430.56-39,234.06-15,684.53

Finding the Fourth Proportional to 28,430.56, 39,234.06 and 15,684.53

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Solution

The fourth proportional to 28,430.56, 39,234.06 and 15,684.53 is: 21,644.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.56 : 39,234.06 = 15,684.53 : x
  2. Step 2: Convert to fraction form
    28,430.56/39,234.06 = 15,684.53/x
  3. Step 3: Cross multiply
    28,430.56x = 39,234.06 × 15,684.53
  4. Step 4: Simplify right side
    28,430.56x = 615,367,821.85
  5. Step 5: Solve for x
    x = 615,367,821.85/28,430.56
  6. Step 6: Final answer
    x = 21,644.59

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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.