Home / 28,771.68-39,717.20-19,345.72

Finding the Fourth Proportional to 28,771.68, 39,717.20 and 19,345.72

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Solution

The fourth proportional to 28,771.68, 39,717.20 and 19,345.72 is: 26,705.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,771.68 : 39,717.20 = 19,345.72 : x
  2. Step 2: Convert to fraction form
    28,771.68/39,717.20 = 19,345.72/x
  3. Step 3: Cross multiply
    28,771.68x = 39,717.20 × 19,345.72
  4. Step 4: Simplify right side
    28,771.68x = 768,357,830.38
  5. Step 5: Solve for x
    x = 768,357,830.38/28,771.68
  6. Step 6: Final answer
    x = 26,705.35

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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.