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Finding the Fourth Proportional to 14,521.60, 21,808.80 and 8,689.60

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Solution

The fourth proportional to 14,521.60, 21,808.80 and 8,689.60 is: 13,050.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,521.60 : 21,808.80 = 8,689.60 : x
  2. Step 2: Convert to fraction form
    14,521.60/21,808.80 = 8,689.60/x
  3. Step 3: Cross multiply
    14,521.60x = 21,808.80 × 8,689.60
  4. Step 4: Simplify right side
    14,521.60x = 189,509,748.48
  5. Step 5: Solve for x
    x = 189,509,748.48/14,521.60
  6. Step 6: Final answer
    x = 13,050.20

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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.