Home / 15,421.06-21,281.02-8,347.60

Finding the Fourth Proportional to 15,421.06, 21,281.02 and 8,347.60

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Solution

The fourth proportional to 15,421.06, 21,281.02 and 8,347.60 is: 11,519.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.06 : 21,281.02 = 8,347.60 : x
  2. Step 2: Convert to fraction form
    15,421.06/21,281.02 = 8,347.60/x
  3. Step 3: Cross multiply
    15,421.06x = 21,281.02 × 8,347.60
  4. Step 4: Simplify right side
    15,421.06x = 177,645,442.55
  5. Step 5: Solve for x
    x = 177,645,442.55/15,421.06
  6. Step 6: Final answer
    x = 11,519.66

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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.