Home / 20,840.54-31,251.35-8,988.71

Finding the Fourth Proportional to 20,840.54, 31,251.35 and 8,988.71

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Solution

The fourth proportional to 20,840.54, 31,251.35 and 8,988.71 is: 13,478.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.54 : 31,251.35 = 8,988.71 : x
  2. Step 2: Convert to fraction form
    20,840.54/31,251.35 = 8,988.71/x
  3. Step 3: Cross multiply
    20,840.54x = 31,251.35 × 8,988.71
  4. Step 4: Simplify right side
    20,840.54x = 280,909,196.51
  5. Step 5: Solve for x
    x = 280,909,196.51/20,840.54
  6. Step 6: Final answer
    x = 13,478.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.