Home / 21,312.07-31,982.69-10,931.11

Finding the Fourth Proportional to 21,312.07, 31,982.69 and 10,931.11

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Solution

The fourth proportional to 21,312.07, 31,982.69 and 10,931.11 is: 16,404.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.07 : 31,982.69 = 10,931.11 : x
  2. Step 2: Convert to fraction form
    21,312.07/31,982.69 = 10,931.11/x
  3. Step 3: Cross multiply
    21,312.07x = 31,982.69 × 10,931.11
  4. Step 4: Simplify right side
    21,312.07x = 349,606,302.49
  5. Step 5: Solve for x
    x = 349,606,302.49/21,312.07
  6. Step 6: Final answer
    x = 16,404.15

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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.