Home / 19,265.40-28,865.70-12,688.20

Finding the Fourth Proportional to 19,265.40, 28,865.70 and 12,688.20

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Solution

The fourth proportional to 19,265.40, 28,865.70 and 12,688.20 is: 19,010.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,265.40 : 28,865.70 = 12,688.20 : x
  2. Step 2: Convert to fraction form
    19,265.40/28,865.70 = 12,688.20/x
  3. Step 3: Cross multiply
    19,265.40x = 28,865.70 × 12,688.20
  4. Step 4: Simplify right side
    19,265.40x = 366,253,774.74
  5. Step 5: Solve for x
    x = 366,253,774.74/19,265.40
  6. Step 6: Final answer
    x = 19,010.96

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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.