Home / 28,495.52-39,320.16-15,920.80

Finding the Fourth Proportional to 28,495.52, 39,320.16 and 15,920.80

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Solution

The fourth proportional to 28,495.52, 39,320.16 and 15,920.80 is: 21,968.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.52 : 39,320.16 = 15,920.80 : x
  2. Step 2: Convert to fraction form
    28,495.52/39,320.16 = 15,920.80/x
  3. Step 3: Cross multiply
    28,495.52x = 39,320.16 × 15,920.80
  4. Step 4: Simplify right side
    28,495.52x = 626,008,403.33
  5. Step 5: Solve for x
    x = 626,008,403.33/28,495.52
  6. Step 6: Final answer
    x = 21,968.66

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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.