Home / 31,431.08-43,384.10-18,693.23

Finding the Fourth Proportional to 31,431.08, 43,384.10 and 18,693.23

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Solution

The fourth proportional to 31,431.08, 43,384.10 and 18,693.23 is: 25,802.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,431.08 : 43,384.10 = 18,693.23 : x
  2. Step 2: Convert to fraction form
    31,431.08/43,384.10 = 18,693.23/x
  3. Step 3: Cross multiply
    31,431.08x = 43,384.10 × 18,693.23
  4. Step 4: Simplify right side
    31,431.08x = 810,988,959.64
  5. Step 5: Solve for x
    x = 810,988,959.64/31,431.08
  6. Step 6: Final answer
    x = 25,802.13

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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.