Home / 28,157.90-38,857.88-15,411.08

Finding the Fourth Proportional to 28,157.90, 38,857.88 and 15,411.08

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Solution

The fourth proportional to 28,157.90, 38,857.88 and 15,411.08 is: 21,267.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.90 : 38,857.88 = 15,411.08 : x
  2. Step 2: Convert to fraction form
    28,157.90/38,857.88 = 15,411.08/x
  3. Step 3: Cross multiply
    28,157.90x = 38,857.88 × 15,411.08
  4. Step 4: Simplify right side
    28,157.90x = 598,842,032.98
  5. Step 5: Solve for x
    x = 598,842,032.98/28,157.90
  6. Step 6: Final answer
    x = 21,267.29

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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.