Home / 21,121.02-31,681.54-9,721.84

Finding the Fourth Proportional to 21,121.02, 31,681.54 and 9,721.84

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Solution

The fourth proportional to 21,121.02, 31,681.54 and 9,721.84 is: 14,582.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.02 : 31,681.54 = 9,721.84 : x
  2. Step 2: Convert to fraction form
    21,121.02/31,681.54 = 9,721.84/x
  3. Step 3: Cross multiply
    21,121.02x = 31,681.54 × 9,721.84
  4. Step 4: Simplify right side
    21,121.02x = 308,002,862.83
  5. Step 5: Solve for x
    x = 308,002,862.83/21,121.02
  6. Step 6: Final answer
    x = 14,582.76

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1.5x scale

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.