Home / 21,438.28-32,116.62-10,312.12

Finding the Fourth Proportional to 21,438.28, 32,116.62 and 10,312.12

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Solution

The fourth proportional to 21,438.28, 32,116.62 and 10,312.12 is: 15,448.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.28 : 32,116.62 = 10,312.12 : x
  2. Step 2: Convert to fraction form
    21,438.28/32,116.62 = 10,312.12/x
  3. Step 3: Cross multiply
    21,438.28x = 32,116.62 × 10,312.12
  4. Step 4: Simplify right side
    21,438.28x = 331,190,439.43
  5. Step 5: Solve for x
    x = 331,190,439.43/21,438.28
  6. Step 6: Final answer
    x = 15,448.55

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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.