Home / 15,519.51-21,416.81-8,445.92

Finding the Fourth Proportional to 15,519.51, 21,416.81 and 8,445.92

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Solution

The fourth proportional to 15,519.51, 21,416.81 and 8,445.92 is: 11,655.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.51 : 21,416.81 = 8,445.92 : x
  2. Step 2: Convert to fraction form
    15,519.51/21,416.81 = 8,445.92/x
  3. Step 3: Cross multiply
    15,519.51x = 21,416.81 × 8,445.92
  4. Step 4: Simplify right side
    15,519.51x = 180,884,514.60
  5. Step 5: Solve for x
    x = 180,884,514.60/15,519.51
  6. Step 6: Final answer
    x = 11,655.30

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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.