Home / 20,587.40-28,410.62-11,155.92

Finding the Fourth Proportional to 20,587.40, 28,410.62 and 11,155.92

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Solution

The fourth proportional to 20,587.40, 28,410.62 and 11,155.92 is: 15,395.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.40 : 28,410.62 = 11,155.92 : x
  2. Step 2: Convert to fraction form
    20,587.40/28,410.62 = 11,155.92/x
  3. Step 3: Cross multiply
    20,587.40x = 28,410.62 × 11,155.92
  4. Step 4: Simplify right side
    20,587.40x = 316,946,603.87
  5. Step 5: Solve for x
    x = 316,946,603.87/20,587.40
  6. Step 6: Final answer
    x = 15,395.17

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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.