Home / 21,178.57-29,225.68-11,748.01

Finding the Fourth Proportional to 21,178.57, 29,225.68 and 11,748.01

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Solution

The fourth proportional to 21,178.57, 29,225.68 and 11,748.01 is: 16,211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.57 : 29,225.68 = 11,748.01 : x
  2. Step 2: Convert to fraction form
    21,178.57/29,225.68 = 11,748.01/x
  3. Step 3: Cross multiply
    21,178.57x = 29,225.68 × 11,748.01
  4. Step 4: Simplify right side
    21,178.57x = 343,343,580.90
  5. Step 5: Solve for x
    x = 343,343,580.90/21,178.57
  6. Step 6: Final answer
    x = 16,211.84

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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.