Home / 13,990.40-20,980.70-4,127.06

Finding the Fourth Proportional to 13,990.40, 20,980.70 and 4,127.06

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Solution

The fourth proportional to 13,990.40, 20,980.70 and 4,127.06 is: 6,189.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.40 : 20,980.70 = 4,127.06 : x
  2. Step 2: Convert to fraction form
    13,990.40/20,980.70 = 4,127.06/x
  3. Step 3: Cross multiply
    13,990.40x = 20,980.70 × 4,127.06
  4. Step 4: Simplify right side
    13,990.40x = 86,588,607.74
  5. Step 5: Solve for x
    x = 86,588,607.74/13,990.40
  6. Step 6: Final answer
    x = 6,189.14

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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.