Home / 20,350.71-30,530.70-7,870.77

Finding the Fourth Proportional to 20,350.71, 30,530.70 and 7,870.77

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Solution

The fourth proportional to 20,350.71, 30,530.70 and 7,870.77 is: 11,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.71 : 30,530.70 = 7,870.77 : x
  2. Step 2: Convert to fraction form
    20,350.71/30,530.70 = 7,870.77/x
  3. Step 3: Cross multiply
    20,350.71x = 30,530.70 × 7,870.77
  4. Step 4: Simplify right side
    20,350.71x = 240,300,117.64
  5. Step 5: Solve for x
    x = 240,300,117.64/20,350.71
  6. Step 6: Final answer
    x = 11,807.95

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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.