Home / 28,807.16-39,751.12-21,257.68

Finding the Fourth Proportional to 28,807.16, 39,751.12 and 21,257.68

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Solution

The fourth proportional to 28,807.16, 39,751.12 and 21,257.68 is: 29,333.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807.16 : 39,751.12 = 21,257.68 : x
  2. Step 2: Convert to fraction form
    28,807.16/39,751.12 = 21,257.68/x
  3. Step 3: Cross multiply
    28,807.16x = 39,751.12 × 21,257.68
  4. Step 4: Simplify right side
    28,807.16x = 845,016,588.60
  5. Step 5: Solve for x
    x = 845,016,588.60/28,807.16
  6. Step 6: Final answer
    x = 29,333.56

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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.