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Finding the Fourth Proportional to 19,289.20, 28,885.20 and 15,401.20

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Solution

The fourth proportional to 19,289.20, 28,885.20 and 15,401.20 is: 23,063.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,289.20 : 28,885.20 = 15,401.20 : x
  2. Step 2: Convert to fraction form
    19,289.20/28,885.20 = 15,401.20/x
  3. Step 3: Cross multiply
    19,289.20x = 28,885.20 × 15,401.20
  4. Step 4: Simplify right side
    19,289.20x = 444,866,742.24
  5. Step 5: Solve for x
    x = 444,866,742.24/19,289.20
  6. Step 6: Final answer
    x = 23,063.00

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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.