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Finding the Fourth Proportional to 9,720.80, 14,548.80 and 8,554.40

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Solution

The fourth proportional to 9,720.80, 14,548.80 and 8,554.40 is: 12,803.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,720.80 : 14,548.80 = 8,554.40 : x
  2. Step 2: Convert to fraction form
    9,720.80/14,548.80 = 8,554.40/x
  3. Step 3: Cross multiply
    9,720.80x = 14,548.80 × 8,554.40
  4. Step 4: Simplify right side
    9,720.80x = 124,456,254.72
  5. Step 5: Solve for x
    x = 124,456,254.72/9,720.80
  6. Step 6: Final answer
    x = 12,803.09

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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.