Home / 20,740.40-31,106.42-5,945.35

Finding the Fourth Proportional to 20,740.40, 31,106.42 and 5,945.35

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Solution

The fourth proportional to 20,740.40, 31,106.42 and 5,945.35 is: 8,916.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.40 : 31,106.42 = 5,945.35 : x
  2. Step 2: Convert to fraction form
    20,740.40/31,106.42 = 5,945.35/x
  3. Step 3: Cross multiply
    20,740.40x = 31,106.42 × 5,945.35
  4. Step 4: Simplify right side
    20,740.40x = 184,938,468.95
  5. Step 5: Solve for x
    x = 184,938,468.95/20,740.40
  6. Step 6: Final answer
    x = 8,916.82

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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.