Home / 28,938.75-39,968.28-19,490.91

Finding the Fourth Proportional to 28,938.75, 39,968.28 and 19,490.91

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Solution

The fourth proportional to 28,938.75, 39,968.28 and 19,490.91 is: 26,919.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,938.75 : 39,968.28 = 19,490.91 : x
  2. Step 2: Convert to fraction form
    28,938.75/39,968.28 = 19,490.91/x
  3. Step 3: Cross multiply
    28,938.75x = 39,968.28 × 19,490.91
  4. Step 4: Simplify right side
    28,938.75x = 779,018,148.33
  5. Step 5: Solve for x
    x = 779,018,148.33/28,938.75
  6. Step 6: Final answer
    x = 26,919.55

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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.