Home / 28,200.78-38,918.34-15,624.72

Finding the Fourth Proportional to 28,200.78, 38,918.34 and 15,624.72

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Solution

The fourth proportional to 28,200.78, 38,918.34 and 15,624.72 is: 21,562.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.78 : 38,918.34 = 15,624.72 : x
  2. Step 2: Convert to fraction form
    28,200.78/38,918.34 = 15,624.72/x
  3. Step 3: Cross multiply
    28,200.78x = 38,918.34 × 15,624.72
  4. Step 4: Simplify right side
    28,200.78x = 608,088,165.36
  5. Step 5: Solve for x
    x = 608,088,165.36/28,200.78
  6. Step 6: Final answer
    x = 21,562.81

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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.