Home / 21,001.18-28,941.75-15,022.47

Finding the Fourth Proportional to 21,001.18, 28,941.75 and 15,022.47

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Solution

The fourth proportional to 21,001.18, 28,941.75 and 15,022.47 is: 20,702.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.18 : 28,941.75 = 15,022.47 : x
  2. Step 2: Convert to fraction form
    21,001.18/28,941.75 = 15,022.47/x
  3. Step 3: Cross multiply
    21,001.18x = 28,941.75 × 15,022.47
  4. Step 4: Simplify right side
    21,001.18x = 434,776,571.12
  5. Step 5: Solve for x
    x = 434,776,571.12/21,001.18
  6. Step 6: Final answer
    x = 20,702.48

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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.