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Finding the Fourth Proportional to 19,398.61, 29,110.67 and 10,639.67

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Solution

The fourth proportional to 19,398.61, 29,110.67 and 10,639.67 is: 15,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.61 : 29,110.67 = 10,639.67 : x
  2. Step 2: Convert to fraction form
    19,398.61/29,110.67 = 10,639.67/x
  3. Step 3: Cross multiply
    19,398.61x = 29,110.67 × 10,639.67
  4. Step 4: Simplify right side
    19,398.61x = 309,727,922.28
  5. Step 5: Solve for x
    x = 309,727,922.28/19,398.61
  6. Step 6: Final answer
    x = 15,966.50

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1.5x scale

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.