Home / 28,021.66-38,670.16-15,446.86

Finding the Fourth Proportional to 28,021.66, 38,670.16 and 15,446.86

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Solution

The fourth proportional to 28,021.66, 38,670.16 and 15,446.86 is: 21,316.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.66 : 38,670.16 = 15,446.86 : x
  2. Step 2: Convert to fraction form
    28,021.66/38,670.16 = 15,446.86/x
  3. Step 3: Cross multiply
    28,021.66x = 38,670.16 × 15,446.86
  4. Step 4: Simplify right side
    28,021.66x = 597,332,547.70
  5. Step 5: Solve for x
    x = 597,332,547.70/28,021.66
  6. Step 6: Final answer
    x = 21,316.82

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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.