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Finding the Fourth Proportional to 21,597.16, 29,809.72 and 13,099.67

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Solution

The fourth proportional to 21,597.16, 29,809.72 and 13,099.67 is: 18,080.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,597.16 : 29,809.72 = 13,099.67 : x
  2. Step 2: Convert to fraction form
    21,597.16/29,809.72 = 13,099.67/x
  3. Step 3: Cross multiply
    21,597.16x = 29,809.72 × 13,099.67
  4. Step 4: Simplify right side
    21,597.16x = 390,497,641.58
  5. Step 5: Solve for x
    x = 390,497,641.58/21,597.16
  6. Step 6: Final answer
    x = 18,080.97

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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.