Home / 21,038.67-31,535.37-10,487.88

Finding the Fourth Proportional to 21,038.67, 31,535.37 and 10,487.88

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Solution

The fourth proportional to 21,038.67, 31,535.37 and 10,487.88 is: 15,720.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.67 : 31,535.37 = 10,487.88 : x
  2. Step 2: Convert to fraction form
    21,038.67/31,535.37 = 10,487.88/x
  3. Step 3: Cross multiply
    21,038.67x = 31,535.37 × 10,487.88
  4. Step 4: Simplify right side
    21,038.67x = 330,739,176.32
  5. Step 5: Solve for x
    x = 330,739,176.32/21,038.67
  6. Step 6: Final answer
    x = 15,720.54

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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.