Home / 18,875.35-28,302.09-6,391.21

Finding the Fourth Proportional to 18,875.35, 28,302.09 and 6,391.21

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Solution

The fourth proportional to 18,875.35, 28,302.09 and 6,391.21 is: 9,583.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,875.35 : 28,302.09 = 6,391.21 : x
  2. Step 2: Convert to fraction form
    18,875.35/28,302.09 = 6,391.21/x
  3. Step 3: Cross multiply
    18,875.35x = 28,302.09 × 6,391.21
  4. Step 4: Simplify right side
    18,875.35x = 180,884,600.63
  5. Step 5: Solve for x
    x = 180,884,600.63/18,875.35
  6. Step 6: Final answer
    x = 9,583.11

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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.