Home / 30,064.81-45,099.80-7,878.18

Finding the Fourth Proportional to 30,064.81, 45,099.80 and 7,878.18

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Solution

The fourth proportional to 30,064.81, 45,099.80 and 7,878.18 is: 11,817.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,064.81 : 45,099.80 = 7,878.18 : x
  2. Step 2: Convert to fraction form
    30,064.81/45,099.80 = 7,878.18/x
  3. Step 3: Cross multiply
    30,064.81x = 45,099.80 × 7,878.18
  4. Step 4: Simplify right side
    30,064.81x = 355,304,342.36
  5. Step 5: Solve for x
    x = 355,304,342.36/30,064.81
  6. Step 6: Final answer
    x = 11,817.95

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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.