Home / 28,218.46-38,943.06-15,642.94

Finding the Fourth Proportional to 28,218.46, 38,943.06 and 15,642.94

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Solution

The fourth proportional to 28,218.46, 38,943.06 and 15,642.94 is: 21,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.46 : 38,943.06 = 15,642.94 : x
  2. Step 2: Convert to fraction form
    28,218.46/38,943.06 = 15,642.94/x
  3. Step 3: Cross multiply
    28,218.46x = 38,943.06 × 15,642.94
  4. Step 4: Simplify right side
    28,218.46x = 609,183,951.00
  5. Step 5: Solve for x
    x = 609,183,951.00/28,218.46
  6. Step 6: Final answer
    x = 21,588.14

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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.