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Finding the Fourth Proportional to 21,364.80, 32,047.20 and 9,051.20

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Solution

The fourth proportional to 21,364.80, 32,047.20 and 9,051.20 is: 13,576.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,364.80 : 32,047.20 = 9,051.20 : x
  2. Step 2: Convert to fraction form
    21,364.80/32,047.20 = 9,051.20/x
  3. Step 3: Cross multiply
    21,364.80x = 32,047.20 × 9,051.20
  4. Step 4: Simplify right side
    21,364.80x = 290,065,616.64
  5. Step 5: Solve for x
    x = 290,065,616.64/21,364.80
  6. Step 6: Final answer
    x = 13,576.80

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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.