Home / 28,170.70-42,270.59-12,386.79

Finding the Fourth Proportional to 28,170.70, 42,270.59 and 12,386.79

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Solution

The fourth proportional to 28,170.70, 42,270.59 and 12,386.79 is: 18,586.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.70 : 42,270.59 = 12,386.79 : x
  2. Step 2: Convert to fraction form
    28,170.70/42,270.59 = 12,386.79/x
  3. Step 3: Cross multiply
    28,170.70x = 42,270.59 × 12,386.79
  4. Step 4: Simplify right side
    28,170.70x = 523,596,952.47
  5. Step 5: Solve for x
    x = 523,596,952.47/28,170.70
  6. Step 6: Final answer
    x = 18,586.58

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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.