Home / 28,456.81-39,272.57-15,712.45

Finding the Fourth Proportional to 28,456.81, 39,272.57 and 15,712.45

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Solution

The fourth proportional to 28,456.81, 39,272.57 and 15,712.45 is: 21,684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.81 : 39,272.57 = 15,712.45 : x
  2. Step 2: Convert to fraction form
    28,456.81/39,272.57 = 15,712.45/x
  3. Step 3: Cross multiply
    28,456.81x = 39,272.57 × 15,712.45
  4. Step 4: Simplify right side
    28,456.81x = 617,068,292.50
  5. Step 5: Solve for x
    x = 617,068,292.50/28,456.81
  6. Step 6: Final answer
    x = 21,684.38

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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.