Home / 28,187.20-38,898.81-15,440.20

Finding the Fourth Proportional to 28,187.20, 38,898.81 and 15,440.20

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Solution

The fourth proportional to 28,187.20, 38,898.81 and 15,440.20 is: 21,307.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.20 : 38,898.81 = 15,440.20 : x
  2. Step 2: Convert to fraction form
    28,187.20/38,898.81 = 15,440.20/x
  3. Step 3: Cross multiply
    28,187.20x = 38,898.81 × 15,440.20
  4. Step 4: Simplify right side
    28,187.20x = 600,605,406.16
  5. Step 5: Solve for x
    x = 600,605,406.16/28,187.20
  6. Step 6: Final answer
    x = 21,307.74

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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.