Home / 15,421.24-21,281.16-8,347.51

Finding the Fourth Proportional to 15,421.24, 21,281.16 and 8,347.51

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Solution

The fourth proportional to 15,421.24, 21,281.16 and 8,347.51 is: 11,519.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.24 : 21,281.16 = 8,347.51 : x
  2. Step 2: Convert to fraction form
    15,421.24/21,281.16 = 8,347.51/x
  3. Step 3: Cross multiply
    15,421.24x = 21,281.16 × 8,347.51
  4. Step 4: Simplify right side
    15,421.24x = 177,644,695.91
  5. Step 5: Solve for x
    x = 177,644,695.91/15,421.24
  6. Step 6: Final answer
    x = 11,519.48

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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.