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Finding the Fourth Proportional to 14,009.40, 21,014.10 and 12,281.40

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Solution

The fourth proportional to 14,009.40, 21,014.10 and 12,281.40 is: 18,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,009.40 : 21,014.10 = 12,281.40 : x
  2. Step 2: Convert to fraction form
    14,009.40/21,014.10 = 12,281.40/x
  3. Step 3: Cross multiply
    14,009.40x = 21,014.10 × 12,281.40
  4. Step 4: Simplify right side
    14,009.40x = 258,082,567.74
  5. Step 5: Solve for x
    x = 258,082,567.74/14,009.40
  6. Step 6: Final answer
    x = 18,422.10

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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.