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Finding the Fourth Proportional to 14,281.16, 21,423.78 and 4,421.20

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Solution

The fourth proportional to 14,281.16, 21,423.78 and 4,421.20 is: 6,632.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,281.16 : 21,423.78 = 4,421.20 : x
  2. Step 2: Convert to fraction form
    14,281.16/21,423.78 = 4,421.20/x
  3. Step 3: Cross multiply
    14,281.16x = 21,423.78 × 4,421.20
  4. Step 4: Simplify right side
    14,281.16x = 94,718,816.14
  5. Step 5: Solve for x
    x = 94,718,816.14/14,281.16
  6. Step 6: Final answer
    x = 6,632.43

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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.