Home / 28,091.08-38,728.78-21,637.98

Finding the Fourth Proportional to 28,091.08, 38,728.78 and 21,637.98

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Solution

The fourth proportional to 28,091.08, 38,728.78 and 21,637.98 is: 29,831.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,091.08 : 38,728.78 = 21,637.98 : x
  2. Step 2: Convert to fraction form
    28,091.08/38,728.78 = 21,637.98/x
  3. Step 3: Cross multiply
    28,091.08x = 38,728.78 × 21,637.98
  4. Step 4: Simplify right side
    28,091.08x = 838,012,567.06
  5. Step 5: Solve for x
    x = 838,012,567.06/28,091.08
  6. Step 6: Final answer
    x = 29,831.98

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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.