Home / 28,028.46-38,678.55-15,281.88

Finding the Fourth Proportional to 28,028.46, 38,678.55 and 15,281.88

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Solution

The fourth proportional to 28,028.46, 38,678.55 and 15,281.88 is: 21,088.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.46 : 38,678.55 = 15,281.88 : x
  2. Step 2: Convert to fraction form
    28,028.46/38,678.55 = 15,281.88/x
  3. Step 3: Cross multiply
    28,028.46x = 38,678.55 × 15,281.88
  4. Step 4: Simplify right side
    28,028.46x = 591,080,959.67
  5. Step 5: Solve for x
    x = 591,080,959.67/28,028.46
  6. Step 6: Final answer
    x = 21,088.60

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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.