Home / 21,319.02-31,981.44-7,275.28

Finding the Fourth Proportional to 21,319.02, 31,981.44 and 7,275.28

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Solution

The fourth proportional to 21,319.02, 31,981.44 and 7,275.28 is: 10,913.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.02 : 31,981.44 = 7,275.28 : x
  2. Step 2: Convert to fraction form
    21,319.02/31,981.44 = 7,275.28/x
  3. Step 3: Cross multiply
    21,319.02x = 31,981.44 × 7,275.28
  4. Step 4: Simplify right side
    21,319.02x = 232,673,930.80
  5. Step 5: Solve for x
    x = 232,673,930.80/21,319.02
  6. Step 6: Final answer
    x = 10,913.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.