Home / 30,747.08-42,434.16-18,818.36

Finding the Fourth Proportional to 30,747.08, 42,434.16 and 18,818.36

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Solution

The fourth proportional to 30,747.08, 42,434.16 and 18,818.36 is: 25,971.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,747.08 : 42,434.16 = 18,818.36 : x
  2. Step 2: Convert to fraction form
    30,747.08/42,434.16 = 18,818.36/x
  3. Step 3: Cross multiply
    30,747.08x = 42,434.16 × 18,818.36
  4. Step 4: Simplify right side
    30,747.08x = 798,541,299.18
  5. Step 5: Solve for x
    x = 798,541,299.18/30,747.08
  6. Step 6: Final answer
    x = 25,971.29

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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.