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Finding the Fourth Proportional to 13,563, 18,715.37 and 7,898.99

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Solution

The fourth proportional to 13,563, 18,715.37 and 7,898.99 is: 10,899.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563 : 18,715.37 = 7,898.99 : x
  2. Step 2: Convert to fraction form
    13,563/18,715.37 = 7,898.99/x
  3. Step 3: Cross multiply
    13,563x = 18,715.37 × 7,898.99
  4. Step 4: Simplify right side
    13,563x = 147,832,387.40
  5. Step 5: Solve for x
    x = 147,832,387.40/13,563
  6. Step 6: Final answer
    x = 10,899.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.