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Finding the Fourth Proportional to 21,756.65, 30,024.14 and 13,258.76

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Solution

The fourth proportional to 21,756.65, 30,024.14 and 13,258.76 is: 18,297.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.65 : 30,024.14 = 13,258.76 : x
  2. Step 2: Convert to fraction form
    21,756.65/30,024.14 = 13,258.76/x
  3. Step 3: Cross multiply
    21,756.65x = 30,024.14 × 13,258.76
  4. Step 4: Simplify right side
    21,756.65x = 398,082,650.05
  5. Step 5: Solve for x
    x = 398,082,650.05/21,756.65
  6. Step 6: Final answer
    x = 18,297.06

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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.