Home / 13,319.57-18,381.40-7,270.21

Finding the Fourth Proportional to 13,319.57, 18,381.40 and 7,270.21

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Solution

The fourth proportional to 13,319.57, 18,381.40 and 7,270.21 is: 10,033.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.57 : 18,381.40 = 7,270.21 : x
  2. Step 2: Convert to fraction form
    13,319.57/18,381.40 = 7,270.21/x
  3. Step 3: Cross multiply
    13,319.57x = 18,381.40 × 7,270.21
  4. Step 4: Simplify right side
    13,319.57x = 133,636,539.50
  5. Step 5: Solve for x
    x = 133,636,539.50/13,319.57
  6. Step 6: Final answer
    x = 10,033.10

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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.