Home / 28,663.39-39,555.65-15,916.78

Finding the Fourth Proportional to 28,663.39, 39,555.65 and 15,916.78

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Solution

The fourth proportional to 28,663.39, 39,555.65 and 15,916.78 is: 21,965.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,663.39 : 39,555.65 = 15,916.78 : x
  2. Step 2: Convert to fraction form
    28,663.39/39,555.65 = 15,916.78/x
  3. Step 3: Cross multiply
    28,663.39x = 39,555.65 × 15,916.78
  4. Step 4: Simplify right side
    28,663.39x = 629,598,301.44
  5. Step 5: Solve for x
    x = 629,598,301.44/28,663.39
  6. Step 6: Final answer
    x = 21,965.25

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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.