Home / 15,719.10-21,701.33-10,421.09

Finding the Fourth Proportional to 15,719.10, 21,701.33 and 10,421.09

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Solution

The fourth proportional to 15,719.10, 21,701.33 and 10,421.09 is: 14,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.10 : 21,701.33 = 10,421.09 : x
  2. Step 2: Convert to fraction form
    15,719.10/21,701.33 = 10,421.09/x
  3. Step 3: Cross multiply
    15,719.10x = 21,701.33 × 10,421.09
  4. Step 4: Simplify right side
    15,719.10x = 226,151,460.94
  5. Step 5: Solve for x
    x = 226,151,460.94/15,719.10
  6. Step 6: Final answer
    x = 14,387.05

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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.