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Finding the Fourth Proportional to 13,641.64, 18,823.93 and 7,673.18

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Solution

The fourth proportional to 13,641.64, 18,823.93 and 7,673.18 is: 10,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,641.64 : 18,823.93 = 7,673.18 : x
  2. Step 2: Convert to fraction form
    13,641.64/18,823.93 = 7,673.18/x
  3. Step 3: Cross multiply
    13,641.64x = 18,823.93 × 7,673.18
  4. Step 4: Simplify right side
    13,641.64x = 144,439,270.71
  5. Step 5: Solve for x
    x = 144,439,270.71/13,641.64
  6. Step 6: Final answer
    x = 10,588.12

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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.