Home / 28,710.95-43,078.75-9,980.78

Finding the Fourth Proportional to 28,710.95, 43,078.75 and 9,980.78

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Solution

The fourth proportional to 28,710.95, 43,078.75 and 9,980.78 is: 14,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,710.95 : 43,078.75 = 9,980.78 : x
  2. Step 2: Convert to fraction form
    28,710.95/43,078.75 = 9,980.78/x
  3. Step 3: Cross multiply
    28,710.95x = 43,078.75 × 9,980.78
  4. Step 4: Simplify right side
    28,710.95x = 429,959,286.08
  5. Step 5: Solve for x
    x = 429,959,286.08/28,710.95
  6. Step 6: Final answer
    x = 14,975.45

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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.