Home / 13,990.77-19,302.90-7,940.01

Finding the Fourth Proportional to 13,990.77, 19,302.90 and 7,940.01

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Solution

The fourth proportional to 13,990.77, 19,302.90 and 7,940.01 is: 10,954.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.77 : 19,302.90 = 7,940.01 : x
  2. Step 2: Convert to fraction form
    13,990.77/19,302.90 = 7,940.01/x
  3. Step 3: Cross multiply
    13,990.77x = 19,302.90 × 7,940.01
  4. Step 4: Simplify right side
    13,990.77x = 153,265,219.03
  5. Step 5: Solve for x
    x = 153,265,219.03/13,990.77
  6. Step 6: Final answer
    x = 10,954.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.