Home / 31,878.86-47,768.30-20,167.34

Finding the Fourth Proportional to 31,878.86, 47,768.30 and 20,167.34

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Solution

The fourth proportional to 31,878.86, 47,768.30 and 20,167.34 is: 30,219.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,878.86 : 47,768.30 = 20,167.34 : x
  2. Step 2: Convert to fraction form
    31,878.86/47,768.30 = 20,167.34/x
  3. Step 3: Cross multiply
    31,878.86x = 47,768.30 × 20,167.34
  4. Step 4: Simplify right side
    31,878.86x = 963,359,547.32
  5. Step 5: Solve for x
    x = 963,359,547.32/31,878.86
  6. Step 6: Final answer
    x = 30,219.39

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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.