Home / 15,659.78-21,556.04-13,666.91

Finding the Fourth Proportional to 15,659.78, 21,556.04 and 13,666.91

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Solution

The fourth proportional to 15,659.78, 21,556.04 and 13,666.91 is: 18,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.78 : 21,556.04 = 13,666.91 : x
  2. Step 2: Convert to fraction form
    15,659.78/21,556.04 = 13,666.91/x
  3. Step 3: Cross multiply
    15,659.78x = 21,556.04 × 13,666.91
  4. Step 4: Simplify right side
    15,659.78x = 294,604,282.52
  5. Step 5: Solve for x
    x = 294,604,282.52/15,659.78
  6. Step 6: Final answer
    x = 18,812.80

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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.