Home / 15,789.58-21,788.85-9,070.45

Finding the Fourth Proportional to 15,789.58, 21,788.85 and 9,070.45

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Solution

The fourth proportional to 15,789.58, 21,788.85 and 9,070.45 is: 12,516.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,789.58 : 21,788.85 = 9,070.45 : x
  2. Step 2: Convert to fraction form
    15,789.58/21,788.85 = 9,070.45/x
  3. Step 3: Cross multiply
    15,789.58x = 21,788.85 × 9,070.45
  4. Step 4: Simplify right side
    15,789.58x = 197,634,674.48
  5. Step 5: Solve for x
    x = 197,634,674.48/15,789.58
  6. Step 6: Final answer
    x = 12,516.78

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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.