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Finding the Fourth Proportional to 21,749.60, 32,602.80 and 10,647.20

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Solution

The fourth proportional to 21,749.60, 32,602.80 and 10,647.20 is: 15,960.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.60 : 32,602.80 = 10,647.20 : x
  2. Step 2: Convert to fraction form
    21,749.60/32,602.80 = 10,647.20/x
  3. Step 3: Cross multiply
    21,749.60x = 32,602.80 × 10,647.20
  4. Step 4: Simplify right side
    21,749.60x = 347,128,532.16
  5. Step 5: Solve for x
    x = 347,128,532.16/21,749.60
  6. Step 6: Final answer
    x = 15,960.23

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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.