Home / 28,710.57-43,078.19-9,980.40

Finding the Fourth Proportional to 28,710.57, 43,078.19 and 9,980.40

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Solution

The fourth proportional to 28,710.57, 43,078.19 and 9,980.40 is: 14,974.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,710.57 : 43,078.19 = 9,980.40 : x
  2. Step 2: Convert to fraction form
    28,710.57/43,078.19 = 9,980.40/x
  3. Step 3: Cross multiply
    28,710.57x = 43,078.19 × 9,980.40
  4. Step 4: Simplify right side
    28,710.57x = 429,937,517.57
  5. Step 5: Solve for x
    x = 429,937,517.57/28,710.57
  6. Step 6: Final answer
    x = 14,974.89

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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.