Home / 28,455.04-39,270.18-15,881.68

Finding the Fourth Proportional to 28,455.04, 39,270.18 and 15,881.68

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Solution

The fourth proportional to 28,455.04, 39,270.18 and 15,881.68 is: 21,917.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.04 : 39,270.18 = 15,881.68 : x
  2. Step 2: Convert to fraction form
    28,455.04/39,270.18 = 15,881.68/x
  3. Step 3: Cross multiply
    28,455.04x = 39,270.18 × 15,881.68
  4. Step 4: Simplify right side
    28,455.04x = 623,676,432.30
  5. Step 5: Solve for x
    x = 623,676,432.30/28,455.04
  6. Step 6: Final answer
    x = 21,917.96

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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.