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Finding the Fourth Proportional to 21,989.68, 32,984.50 and 8,838.97

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Solution

The fourth proportional to 21,989.68, 32,984.50 and 8,838.97 is: 13,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.68 : 32,984.50 = 8,838.97 : x
  2. Step 2: Convert to fraction form
    21,989.68/32,984.50 = 8,838.97/x
  3. Step 3: Cross multiply
    21,989.68x = 32,984.50 × 8,838.97
  4. Step 4: Simplify right side
    21,989.68x = 291,549,140.81
  5. Step 5: Solve for x
    x = 291,549,140.81/21,989.68
  6. Step 6: Final answer
    x = 13,258.45

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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.