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Finding the Fourth Proportional to 14,008.30, 21,012.45 and 12,712.30

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Solution

The fourth proportional to 14,008.30, 21,012.45 and 12,712.30 is: 19,068.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008.30 : 21,012.45 = 12,712.30 : x
  2. Step 2: Convert to fraction form
    14,008.30/21,012.45 = 12,712.30/x
  3. Step 3: Cross multiply
    14,008.30x = 21,012.45 × 12,712.30
  4. Step 4: Simplify right side
    14,008.30x = 267,116,568.14
  5. Step 5: Solve for x
    x = 267,116,568.14/14,008.30
  6. Step 6: Final answer
    x = 19,068.45

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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.