Home / 21,140.28-31,686.54-10,031.56

Finding the Fourth Proportional to 21,140.28, 31,686.54 and 10,031.56

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Solution

The fourth proportional to 21,140.28, 31,686.54 and 10,031.56 is: 15,036.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.28 : 31,686.54 = 10,031.56 : x
  2. Step 2: Convert to fraction form
    21,140.28/31,686.54 = 10,031.56/x
  3. Step 3: Cross multiply
    21,140.28x = 31,686.54 × 10,031.56
  4. Step 4: Simplify right side
    21,140.28x = 317,865,427.20
  5. Step 5: Solve for x
    x = 317,865,427.20/21,140.28
  6. Step 6: Final answer
    x = 15,036.01

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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.