Home / 28,108.87-42,158.53-9,386.79

Finding the Fourth Proportional to 28,108.87, 42,158.53 and 9,386.79

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Solution

The fourth proportional to 28,108.87, 42,158.53 and 9,386.79 is: 14,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,108.87 : 42,158.53 = 9,386.79 : x
  2. Step 2: Convert to fraction form
    28,108.87/42,158.53 = 9,386.79/x
  3. Step 3: Cross multiply
    28,108.87x = 42,158.53 × 9,386.79
  4. Step 4: Simplify right side
    28,108.87x = 395,733,068.66
  5. Step 5: Solve for x
    x = 395,733,068.66/28,108.87
  6. Step 6: Final answer
    x = 14,078.58

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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.