Home / 15,717.42-21,557.15-13,945.95

Finding the Fourth Proportional to 15,717.42, 21,557.15 and 13,945.95

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Solution

The fourth proportional to 15,717.42, 21,557.15 and 13,945.95 is: 19,127.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.42 : 21,557.15 = 13,945.95 : x
  2. Step 2: Convert to fraction form
    15,717.42/21,557.15 = 13,945.95/x
  3. Step 3: Cross multiply
    15,717.42x = 21,557.15 × 13,945.95
  4. Step 4: Simplify right side
    15,717.42x = 300,634,936.04
  5. Step 5: Solve for x
    x = 300,634,936.04/15,717.42
  6. Step 6: Final answer
    x = 19,127.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.