Home / 15,785.74-21,784.40-8,712.62

Finding the Fourth Proportional to 15,785.74, 21,784.40 and 8,712.62

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Solution

The fourth proportional to 15,785.74, 21,784.40 and 8,712.62 is: 12,023.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.74 : 21,784.40 = 8,712.62 : x
  2. Step 2: Convert to fraction form
    15,785.74/21,784.40 = 8,712.62/x
  3. Step 3: Cross multiply
    15,785.74x = 21,784.40 × 8,712.62
  4. Step 4: Simplify right side
    15,785.74x = 189,799,199.13
  5. Step 5: Solve for x
    x = 189,799,199.13/15,785.74
  6. Step 6: Final answer
    x = 12,023.46

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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.