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Finding the Fourth Proportional to 14,155.04, 21,218.72 and 7,918.08

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Solution

The fourth proportional to 14,155.04, 21,218.72 and 7,918.08 is: 11,869.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,155.04 : 21,218.72 = 7,918.08 : x
  2. Step 2: Convert to fraction form
    14,155.04/21,218.72 = 7,918.08/x
  3. Step 3: Cross multiply
    14,155.04x = 21,218.72 × 7,918.08
  4. Step 4: Simplify right side
    14,155.04x = 168,011,522.46
  5. Step 5: Solve for x
    x = 168,011,522.46/14,155.04
  6. Step 6: Final answer
    x = 11,869.38

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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.