Home / 13,870.28-19,140.80-7,902.30

Finding the Fourth Proportional to 13,870.28, 19,140.80 and 7,902.30

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Solution

The fourth proportional to 13,870.28, 19,140.80 and 7,902.30 is: 10,905.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.28 : 19,140.80 = 7,902.30 : x
  2. Step 2: Convert to fraction form
    13,870.28/19,140.80 = 7,902.30/x
  3. Step 3: Cross multiply
    13,870.28x = 19,140.80 × 7,902.30
  4. Step 4: Simplify right side
    13,870.28x = 151,256,343.84
  5. Step 5: Solve for x
    x = 151,256,343.84/13,870.28
  6. Step 6: Final answer
    x = 10,905.07

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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.