Home / 28,345.88-39,117.32-15,770.63

Finding the Fourth Proportional to 28,345.88, 39,117.32 and 15,770.63

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Solution

The fourth proportional to 28,345.88, 39,117.32 and 15,770.63 is: 21,763.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.88 : 39,117.32 = 15,770.63 : x
  2. Step 2: Convert to fraction form
    28,345.88/39,117.32 = 15,770.63/x
  3. Step 3: Cross multiply
    28,345.88x = 39,117.32 × 15,770.63
  4. Step 4: Simplify right side
    28,345.88x = 616,904,505.87
  5. Step 5: Solve for x
    x = 616,904,505.87/28,345.88
  6. Step 6: Final answer
    x = 21,763.47

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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.