Home / 20,926.02-31,389.08-5,131.12

Finding the Fourth Proportional to 20,926.02, 31,389.08 and 5,131.12

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Solution

The fourth proportional to 20,926.02, 31,389.08 and 5,131.12 is: 7,696.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.02 : 31,389.08 = 5,131.12 : x
  2. Step 2: Convert to fraction form
    20,926.02/31,389.08 = 5,131.12/x
  3. Step 3: Cross multiply
    20,926.02x = 31,389.08 × 5,131.12
  4. Step 4: Simplify right side
    20,926.02x = 161,060,979.22
  5. Step 5: Solve for x
    x = 161,060,979.22/20,926.02
  6. Step 6: Final answer
    x = 7,696.69

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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.