Home / 6,428.04-8,870.70-3,909.92

Finding the Fourth Proportional to 6,428.04, 8,870.70 and 3,909.92

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Solution

The fourth proportional to 6,428.04, 8,870.70 and 3,909.92 is: 5,395.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.04 : 8,870.70 = 3,909.92 : x
  2. Step 2: Convert to fraction form
    6,428.04/8,870.70 = 3,909.92/x
  3. Step 3: Cross multiply
    6,428.04x = 8,870.70 × 3,909.92
  4. Step 4: Simplify right side
    6,428.04x = 34,683,727.34
  5. Step 5: Solve for x
    x = 34,683,727.34/6,428.04
  6. Step 6: Final answer
    x = 5,395.69

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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.