Home / 21,438.61-29,599.73-13,384.54

Finding the Fourth Proportional to 21,438.61, 29,599.73 and 13,384.54

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Solution

The fourth proportional to 21,438.61, 29,599.73 and 13,384.54 is: 18,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.61 : 29,599.73 = 13,384.54 : x
  2. Step 2: Convert to fraction form
    21,438.61/29,599.73 = 13,384.54/x
  3. Step 3: Cross multiply
    21,438.61x = 29,599.73 × 13,384.54
  4. Step 4: Simplify right side
    21,438.61x = 396,178,770.17
  5. Step 5: Solve for x
    x = 396,178,770.17/21,438.61
  6. Step 6: Final answer
    x = 18,479.69

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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.