Home / 31,520.95-43,516.70-20,925.07

Finding the Fourth Proportional to 31,520.95, 43,516.70 and 20,925.07

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Solution

The fourth proportional to 31,520.95, 43,516.70 and 20,925.07 is: 28,888.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,520.95 : 43,516.70 = 20,925.07 : x
  2. Step 2: Convert to fraction form
    31,520.95/43,516.70 = 20,925.07/x
  3. Step 3: Cross multiply
    31,520.95x = 43,516.70 × 20,925.07
  4. Step 4: Simplify right side
    31,520.95x = 910,589,993.67
  5. Step 5: Solve for x
    x = 910,589,993.67/31,520.95
  6. Step 6: Final answer
    x = 28,888.41

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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.