Home / 28,931.07-39,942.29-18,876.94

Finding the Fourth Proportional to 28,931.07, 39,942.29 and 18,876.94

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Solution

The fourth proportional to 28,931.07, 39,942.29 and 18,876.94 is: 26,061.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,931.07 : 39,942.29 = 18,876.94 : x
  2. Step 2: Convert to fraction form
    28,931.07/39,942.29 = 18,876.94/x
  3. Step 3: Cross multiply
    28,931.07x = 39,942.29 × 18,876.94
  4. Step 4: Simplify right side
    28,931.07x = 753,988,211.79
  5. Step 5: Solve for x
    x = 753,988,211.79/28,931.07
  6. Step 6: Final answer
    x = 26,061.54

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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.