Home / 21,966.78-30,312.24-13,012.76

Finding the Fourth Proportional to 21,966.78, 30,312.24 and 13,012.76

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Solution

The fourth proportional to 21,966.78, 30,312.24 and 13,012.76 is: 17,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,966.78 : 30,312.24 = 13,012.76 : x
  2. Step 2: Convert to fraction form
    21,966.78/30,312.24 = 13,012.76/x
  3. Step 3: Cross multiply
    21,966.78x = 30,312.24 × 13,012.76
  4. Step 4: Simplify right side
    21,966.78x = 394,445,904.18
  5. Step 5: Solve for x
    x = 394,445,904.18/21,966.78
  6. Step 6: Final answer
    x = 17,956.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.