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Finding the Fourth Proportional to 19,561.20, 29,320.20 and 10,802.40

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Solution

The fourth proportional to 19,561.20, 29,320.20 and 10,802.40 is: 16,191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,561.20 : 29,320.20 = 10,802.40 : x
  2. Step 2: Convert to fraction form
    19,561.20/29,320.20 = 10,802.40/x
  3. Step 3: Cross multiply
    19,561.20x = 29,320.20 × 10,802.40
  4. Step 4: Simplify right side
    19,561.20x = 316,728,528.48
  5. Step 5: Solve for x
    x = 316,728,528.48/19,561.20
  6. Step 6: Final answer
    x = 16,191.67

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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.