Home / 28,281.92-39,030.40-15,705.92

Finding the Fourth Proportional to 28,281.92, 39,030.40 and 15,705.92

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Solution

The fourth proportional to 28,281.92, 39,030.40 and 15,705.92 is: 21,674.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,281.92 : 39,030.40 = 15,705.92 : x
  2. Step 2: Convert to fraction form
    28,281.92/39,030.40 = 15,705.92/x
  3. Step 3: Cross multiply
    28,281.92x = 39,030.40 × 15,705.92
  4. Step 4: Simplify right side
    28,281.92x = 613,008,339.97
  5. Step 5: Solve for x
    x = 613,008,339.97/28,281.92
  6. Step 6: Final answer
    x = 21,674.92

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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.