Home / 28,578.48-39,475.80-21,040.08

Finding the Fourth Proportional to 28,578.48, 39,475.80 and 21,040.08

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Solution

The fourth proportional to 28,578.48, 39,475.80 and 21,040.08 is: 29,062.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.48 : 39,475.80 = 21,040.08 : x
  2. Step 2: Convert to fraction form
    28,578.48/39,475.80 = 21,040.08/x
  3. Step 3: Cross multiply
    28,578.48x = 39,475.80 × 21,040.08
  4. Step 4: Simplify right side
    28,578.48x = 830,573,990.06
  5. Step 5: Solve for x
    x = 830,573,990.06/28,578.48
  6. Step 6: Final answer
    x = 29,062.92

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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.