Home / 15,078.40-20,815.32-10,051

Finding the Fourth Proportional to 15,078.40, 20,815.32 and 10,051

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Solution

The fourth proportional to 15,078.40, 20,815.32 and 10,051 is: 13,875.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.40 : 20,815.32 = 10,051 : x
  2. Step 2: Convert to fraction form
    15,078.40/20,815.32 = 10,051/x
  3. Step 3: Cross multiply
    15,078.40x = 20,815.32 × 10,051
  4. Step 4: Simplify right side
    15,078.40x = 209,214,781.32
  5. Step 5: Solve for x
    x = 209,214,781.32/15,078.40
  6. Step 6: Final answer
    x = 13,875.13

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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.