Home / 31,106.35-42,929.85-18,363.74

Finding the Fourth Proportional to 31,106.35, 42,929.85 and 18,363.74

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Solution

The fourth proportional to 31,106.35, 42,929.85 and 18,363.74 is: 25,343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,106.35 : 42,929.85 = 18,363.74 : x
  2. Step 2: Convert to fraction form
    31,106.35/42,929.85 = 18,363.74/x
  3. Step 3: Cross multiply
    31,106.35x = 42,929.85 × 18,363.74
  4. Step 4: Simplify right side
    31,106.35x = 788,352,603.64
  5. Step 5: Solve for x
    x = 788,352,603.64/31,106.35
  6. Step 6: Final answer
    x = 25,343.78

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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.