Home / 21,931.08-32,904.88-13,172.10

Finding the Fourth Proportional to 21,931.08, 32,904.88 and 13,172.10

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Solution

The fourth proportional to 21,931.08, 32,904.88 and 13,172.10 is: 19,763.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.08 : 32,904.88 = 13,172.10 : x
  2. Step 2: Convert to fraction form
    21,931.08/32,904.88 = 13,172.10/x
  3. Step 3: Cross multiply
    21,931.08x = 32,904.88 × 13,172.10
  4. Step 4: Simplify right side
    21,931.08x = 433,426,369.85
  5. Step 5: Solve for x
    x = 433,426,369.85/21,931.08
  6. Step 6: Final answer
    x = 19,763.11

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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.