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Finding the Fourth Proportional to 21,989.64, 32,985.99 and 8,842.02

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Solution

The fourth proportional to 21,989.64, 32,985.99 and 8,842.02 is: 13,263.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.64 : 32,985.99 = 8,842.02 : x
  2. Step 2: Convert to fraction form
    21,989.64/32,985.99 = 8,842.02/x
  3. Step 3: Cross multiply
    21,989.64x = 32,985.99 × 8,842.02
  4. Step 4: Simplify right side
    21,989.64x = 291,662,783.30
  5. Step 5: Solve for x
    x = 291,662,783.30/21,989.64
  6. Step 6: Final answer
    x = 13,263.65

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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.