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Finding the Fourth Proportional to 21,897.40, 32,867.70 and 10,816.60

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Solution

The fourth proportional to 21,897.40, 32,867.70 and 10,816.60 is: 16,235.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,897.40 : 32,867.70 = 10,816.60 : x
  2. Step 2: Convert to fraction form
    21,897.40/32,867.70 = 10,816.60/x
  3. Step 3: Cross multiply
    21,897.40x = 32,867.70 × 10,816.60
  4. Step 4: Simplify right side
    21,897.40x = 355,516,763.82
  5. Step 5: Solve for x
    x = 355,516,763.82/21,897.40
  6. Step 6: Final answer
    x = 16,235.57

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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.