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Finding the Fourth Proportional to 18,317.71, 27,457.87 and 7,219.90

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Solution

The fourth proportional to 18,317.71, 27,457.87 and 7,219.90 is: 10,822.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,317.71 : 27,457.87 = 7,219.90 : x
  2. Step 2: Convert to fraction form
    18,317.71/27,457.87 = 7,219.90/x
  3. Step 3: Cross multiply
    18,317.71x = 27,457.87 × 7,219.90
  4. Step 4: Simplify right side
    18,317.71x = 198,243,075.61
  5. Step 5: Solve for x
    x = 198,243,075.61/18,317.71
  6. Step 6: Final answer
    x = 10,822.48

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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.