Home / 15,788.52-21,789.30-9,075.78

Finding the Fourth Proportional to 15,788.52, 21,789.30 and 9,075.78

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Solution

The fourth proportional to 15,788.52, 21,789.30 and 9,075.78 is: 12,525.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.52 : 21,789.30 = 9,075.78 : x
  2. Step 2: Convert to fraction form
    15,788.52/21,789.30 = 9,075.78/x
  3. Step 3: Cross multiply
    15,788.52x = 21,789.30 × 9,075.78
  4. Step 4: Simplify right side
    15,788.52x = 197,754,893.15
  5. Step 5: Solve for x
    x = 197,754,893.15/15,788.52
  6. Step 6: Final answer
    x = 12,525.23

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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.