Home / 21,047.60-31,555.40-10,666.80

Finding the Fourth Proportional to 21,047.60, 31,555.40 and 10,666.80

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Solution

The fourth proportional to 21,047.60, 31,555.40 and 10,666.80 is: 15,992.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.60 : 31,555.40 = 10,666.80 : x
  2. Step 2: Convert to fraction form
    21,047.60/31,555.40 = 10,666.80/x
  3. Step 3: Cross multiply
    21,047.60x = 31,555.40 × 10,666.80
  4. Step 4: Simplify right side
    21,047.60x = 336,595,140.72
  5. Step 5: Solve for x
    x = 336,595,140.72/21,047.60
  6. Step 6: Final answer
    x = 15,992.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.