Home / 28,160.85-38,860.38-15,411.63

Finding the Fourth Proportional to 28,160.85, 38,860.38 and 15,411.63

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Solution

The fourth proportional to 28,160.85, 38,860.38 and 15,411.63 is: 21,267.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,160.85 : 38,860.38 = 15,411.63 : x
  2. Step 2: Convert to fraction form
    28,160.85/38,860.38 = 15,411.63/x
  3. Step 3: Cross multiply
    28,160.85x = 38,860.38 × 15,411.63
  4. Step 4: Simplify right side
    28,160.85x = 598,901,798.22
  5. Step 5: Solve for x
    x = 598,901,798.22/28,160.85
  6. Step 6: Final answer
    x = 21,267.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.