Home / 21,124.12-31,685.48-10,038.76

Finding the Fourth Proportional to 21,124.12, 31,685.48 and 10,038.76

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Solution

The fourth proportional to 21,124.12, 31,685.48 and 10,038.76 is: 15,057.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.12 : 31,685.48 = 10,038.76 : x
  2. Step 2: Convert to fraction form
    21,124.12/31,685.48 = 10,038.76/x
  3. Step 3: Cross multiply
    21,124.12x = 31,685.48 × 10,038.76
  4. Step 4: Simplify right side
    21,124.12x = 318,082,929.20
  5. Step 5: Solve for x
    x = 318,082,929.20/21,124.12
  6. Step 6: Final answer
    x = 15,057.81

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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.