Home / 21,009.10-31,513.65-13,233.10

Finding the Fourth Proportional to 21,009.10, 31,513.65 and 13,233.10

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Solution

The fourth proportional to 21,009.10, 31,513.65 and 13,233.10 is: 19,849.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.10 : 31,513.65 = 13,233.10 : x
  2. Step 2: Convert to fraction form
    21,009.10/31,513.65 = 13,233.10/x
  3. Step 3: Cross multiply
    21,009.10x = 31,513.65 × 13,233.10
  4. Step 4: Simplify right side
    21,009.10x = 417,023,281.82
  5. Step 5: Solve for x
    x = 417,023,281.82/21,009.10
  6. Step 6: Final answer
    x = 19,849.65

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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.