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Finding the Fourth Proportional to 14,106.40, 21,116.40 and 10,218.40

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Solution

The fourth proportional to 14,106.40, 21,116.40 and 10,218.40 is: 15,296.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,106.40 : 21,116.40 = 10,218.40 : x
  2. Step 2: Convert to fraction form
    14,106.40/21,116.40 = 10,218.40/x
  3. Step 3: Cross multiply
    14,106.40x = 21,116.40 × 10,218.40
  4. Step 4: Simplify right side
    14,106.40x = 215,775,821.76
  5. Step 5: Solve for x
    x = 215,775,821.76/14,106.40
  6. Step 6: Final answer
    x = 15,296.31

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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.