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Finding the Fourth Proportional to 15,556.68, 21,489.84 and 14,980.68

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Solution

The fourth proportional to 15,556.68, 21,489.84 and 14,980.68 is: 20,694.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,556.68 : 21,489.84 = 14,980.68 : x
  2. Step 2: Convert to fraction form
    15,556.68/21,489.84 = 14,980.68/x
  3. Step 3: Cross multiply
    15,556.68x = 21,489.84 × 14,980.68
  4. Step 4: Simplify right side
    15,556.68x = 321,932,416.29
  5. Step 5: Solve for x
    x = 321,932,416.29/15,556.68
  6. Step 6: Final answer
    x = 20,694.16

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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.