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Finding the Fourth Proportional to 43,503.04, 65,276.88 and 21,316

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Solution

The fourth proportional to 43,503.04, 65,276.88 and 21,316 is: 31,984.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,503.04 : 65,276.88 = 21,316 : x
  2. Step 2: Convert to fraction form
    43,503.04/65,276.88 = 21,316/x
  3. Step 3: Cross multiply
    43,503.04x = 65,276.88 × 21,316
  4. Step 4: Simplify right side
    43,503.04x = 1,391,441,974.08
  5. Step 5: Solve for x
    x = 1,391,441,974.08/43,503.04
  6. Step 6: Final answer
    x = 31,984.94

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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.