Home / 20,746.78-28,654.44-15,106.74

Finding the Fourth Proportional to 20,746.78, 28,654.44 and 15,106.74

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Solution

The fourth proportional to 20,746.78, 28,654.44 and 15,106.74 is: 20,864.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.78 : 28,654.44 = 15,106.74 : x
  2. Step 2: Convert to fraction form
    20,746.78/28,654.44 = 15,106.74/x
  3. Step 3: Cross multiply
    20,746.78x = 28,654.44 × 15,106.74
  4. Step 4: Simplify right side
    20,746.78x = 432,875,174.93
  5. Step 5: Solve for x
    x = 432,875,174.93/20,746.78
  6. Step 6: Final answer
    x = 20,864.69

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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.