Home / 21,281.05-31,903.08-10,742.29

Finding the Fourth Proportional to 21,281.05, 31,903.08 and 10,742.29

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Solution

The fourth proportional to 21,281.05, 31,903.08 and 10,742.29 is: 16,104.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.05 : 31,903.08 = 10,742.29 : x
  2. Step 2: Convert to fraction form
    21,281.05/31,903.08 = 10,742.29/x
  3. Step 3: Cross multiply
    21,281.05x = 31,903.08 × 10,742.29
  4. Step 4: Simplify right side
    21,281.05x = 342,712,257.09
  5. Step 5: Solve for x
    x = 342,712,257.09/21,281.05
  6. Step 6: Final answer
    x = 16,104.10

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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.