Home / 19,315.61-28,985.60-8,222.28

Finding the Fourth Proportional to 19,315.61, 28,985.60 and 8,222.28

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Solution

The fourth proportional to 19,315.61, 28,985.60 and 8,222.28 is: 12,338.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,315.61 : 28,985.60 = 8,222.28 : x
  2. Step 2: Convert to fraction form
    19,315.61/28,985.60 = 8,222.28/x
  3. Step 3: Cross multiply
    19,315.61x = 28,985.60 × 8,222.28
  4. Step 4: Simplify right side
    19,315.61x = 238,327,719.17
  5. Step 5: Solve for x
    x = 238,327,719.17/19,315.61
  6. Step 6: Final answer
    x = 12,338.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.