Home / 28,159.64-38,860.30-15,412.82

Finding the Fourth Proportional to 28,159.64, 38,860.30 and 15,412.82

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Solution

The fourth proportional to 28,159.64, 38,860.30 and 15,412.82 is: 21,269.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,159.64 : 38,860.30 = 15,412.82 : x
  2. Step 2: Convert to fraction form
    28,159.64/38,860.30 = 15,412.82/x
  3. Step 3: Cross multiply
    28,159.64x = 38,860.30 × 15,412.82
  4. Step 4: Simplify right side
    28,159.64x = 598,946,809.05
  5. Step 5: Solve for x
    x = 598,946,809.05/28,159.64
  6. Step 6: Final answer
    x = 21,269.69

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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.