Home / 28,116.78-42,143.16-9,392.40

Finding the Fourth Proportional to 28,116.78, 42,143.16 and 9,392.40

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Solution

The fourth proportional to 28,116.78, 42,143.16 and 9,392.40 is: 14,077.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116.78 : 42,143.16 = 9,392.40 : x
  2. Step 2: Convert to fraction form
    28,116.78/42,143.16 = 9,392.40/x
  3. Step 3: Cross multiply
    28,116.78x = 42,143.16 × 9,392.40
  4. Step 4: Simplify right side
    28,116.78x = 395,825,415.98
  5. Step 5: Solve for x
    x = 395,825,415.98/28,116.78
  6. Step 6: Final answer
    x = 14,077.91

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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.