Home / 15,421.19-21,281.22-8,347.59

Finding the Fourth Proportional to 15,421.19, 21,281.22 and 8,347.59

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Solution

The fourth proportional to 15,421.19, 21,281.22 and 8,347.59 is: 11,519.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.19 : 21,281.22 = 8,347.59 : x
  2. Step 2: Convert to fraction form
    15,421.19/21,281.22 = 8,347.59/x
  3. Step 3: Cross multiply
    15,421.19x = 21,281.22 × 8,347.59
  4. Step 4: Simplify right side
    15,421.19x = 177,646,899.26
  5. Step 5: Solve for x
    x = 177,646,899.26/15,421.19
  6. Step 6: Final answer
    x = 11,519.67

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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.