Home / 12,530.40-18,795.90-4,210.70

Finding the Fourth Proportional to 12,530.40, 18,795.90 and 4,210.70

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Solution

The fourth proportional to 12,530.40, 18,795.90 and 4,210.70 is: 6,316.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,530.40 : 18,795.90 = 4,210.70 : x
  2. Step 2: Convert to fraction form
    12,530.40/18,795.90 = 4,210.70/x
  3. Step 3: Cross multiply
    12,530.40x = 18,795.90 × 4,210.70
  4. Step 4: Simplify right side
    12,530.40x = 79,143,896.13
  5. Step 5: Solve for x
    x = 79,143,896.13/12,530.40
  6. Step 6: Final answer
    x = 6,316.15

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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.