Home / 28,920.48-39,878.82-18,830.40

Finding the Fourth Proportional to 28,920.48, 39,878.82 and 18,830.40

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Solution

The fourth proportional to 28,920.48, 39,878.82 and 18,830.40 is: 25,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.48 : 39,878.82 = 18,830.40 : x
  2. Step 2: Convert to fraction form
    28,920.48/39,878.82 = 18,830.40/x
  3. Step 3: Cross multiply
    28,920.48x = 39,878.82 × 18,830.40
  4. Step 4: Simplify right side
    28,920.48x = 750,934,132.13
  5. Step 5: Solve for x
    x = 750,934,132.13/28,920.48
  6. Step 6: Final answer
    x = 25,965.48

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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.