Home / 13,871.40-20,820.15-7,302.30

Finding the Fourth Proportional to 13,871.40, 20,820.15 and 7,302.30

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Solution

The fourth proportional to 13,871.40, 20,820.15 and 7,302.30 is: 10,960.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.40 : 20,820.15 = 7,302.30 : x
  2. Step 2: Convert to fraction form
    13,871.40/20,820.15 = 7,302.30/x
  3. Step 3: Cross multiply
    13,871.40x = 20,820.15 × 7,302.30
  4. Step 4: Simplify right side
    13,871.40x = 152,034,981.35
  5. Step 5: Solve for x
    x = 152,034,981.35/13,871.40
  6. Step 6: Final answer
    x = 10,960.32

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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.