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Finding the Fourth Proportional to 14,671.72, 21,948.18 and 12,210.40

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Solution

The fourth proportional to 14,671.72, 21,948.18 and 12,210.40 is: 18,266.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,671.72 : 21,948.18 = 12,210.40 : x
  2. Step 2: Convert to fraction form
    14,671.72/21,948.18 = 12,210.40/x
  3. Step 3: Cross multiply
    14,671.72x = 21,948.18 × 12,210.40
  4. Step 4: Simplify right side
    14,671.72x = 267,996,057.07
  5. Step 5: Solve for x
    x = 267,996,057.07/14,671.72
  6. Step 6: Final answer
    x = 18,266.16

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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.