Home / 28,760.13-39,603.15-28,105.11

Finding the Fourth Proportional to 28,760.13, 39,603.15 and 28,105.11

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Solution

The fourth proportional to 28,760.13, 39,603.15 and 28,105.11 is: 38,701.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,760.13 : 39,603.15 = 28,105.11 : x
  2. Step 2: Convert to fraction form
    28,760.13/39,603.15 = 28,105.11/x
  3. Step 3: Cross multiply
    28,760.13x = 39,603.15 × 28,105.11
  4. Step 4: Simplify right side
    28,760.13x = 1,113,050,887.10
  5. Step 5: Solve for x
    x = 1,113,050,887.10/28,760.13
  6. Step 6: Final answer
    x = 38,701.18

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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.