Home / 15,782.47-21,780.45-9,070.20

Finding the Fourth Proportional to 15,782.47, 21,780.45 and 9,070.20

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Solution

The fourth proportional to 15,782.47, 21,780.45 and 9,070.20 is: 12,517.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.47 : 21,780.45 = 9,070.20 : x
  2. Step 2: Convert to fraction form
    15,782.47/21,780.45 = 9,070.20/x
  3. Step 3: Cross multiply
    15,782.47x = 21,780.45 × 9,070.20
  4. Step 4: Simplify right side
    15,782.47x = 197,553,037.59
  5. Step 5: Solve for x
    x = 197,553,037.59/15,782.47
  6. Step 6: Final answer
    x = 12,517.24

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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.