Home / 15,310.80-21,123.72-9,725.04

Finding the Fourth Proportional to 15,310.80, 21,123.72 and 9,725.04

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Solution

The fourth proportional to 15,310.80, 21,123.72 and 9,725.04 is: 13,417.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,310.80 : 21,123.72 = 9,725.04 : x
  2. Step 2: Convert to fraction form
    15,310.80/21,123.72 = 9,725.04/x
  3. Step 3: Cross multiply
    15,310.80x = 21,123.72 × 9,725.04
  4. Step 4: Simplify right side
    15,310.80x = 205,429,021.95
  5. Step 5: Solve for x
    x = 205,429,021.95/15,310.80
  6. Step 6: Final answer
    x = 13,417.26

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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.