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Finding the Fourth Proportional to 14,030.40, 21,034.80 and 7,874.40

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Solution

The fourth proportional to 14,030.40, 21,034.80 and 7,874.40 is: 11,805.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,030.40 : 21,034.80 = 7,874.40 : x
  2. Step 2: Convert to fraction form
    14,030.40/21,034.80 = 7,874.40/x
  3. Step 3: Cross multiply
    14,030.40x = 21,034.80 × 7,874.40
  4. Step 4: Simplify right side
    14,030.40x = 165,636,429.12
  5. Step 5: Solve for x
    x = 165,636,429.12/14,030.40
  6. Step 6: Final answer
    x = 11,805.54

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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.