Home / 14,140.30-21,210.75-4,279.56

Finding the Fourth Proportional to 14,140.30, 21,210.75 and 4,279.56

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Solution

The fourth proportional to 14,140.30, 21,210.75 and 4,279.56 is: 6,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,140.30 : 21,210.75 = 4,279.56 : x
  2. Step 2: Convert to fraction form
    14,140.30/21,210.75 = 4,279.56/x
  3. Step 3: Cross multiply
    14,140.30x = 21,210.75 × 4,279.56
  4. Step 4: Simplify right side
    14,140.30x = 90,772,677.27
  5. Step 5: Solve for x
    x = 90,772,677.27/14,140.30
  6. Step 6: Final answer
    x = 6,419.43

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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.