Home / 13,999.08-20,980.80-7,428.36

Finding the Fourth Proportional to 13,999.08, 20,980.80 and 7,428.36

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Solution

The fourth proportional to 13,999.08, 20,980.80 and 7,428.36 is: 11,133.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.08 : 20,980.80 = 7,428.36 : x
  2. Step 2: Convert to fraction form
    13,999.08/20,980.80 = 7,428.36/x
  3. Step 3: Cross multiply
    13,999.08x = 20,980.80 × 7,428.36
  4. Step 4: Simplify right side
    13,999.08x = 155,852,935.49
  5. Step 5: Solve for x
    x = 155,852,935.49/13,999.08
  6. Step 6: Final answer
    x = 11,133.08

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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.