Home / 3,123.84-4,685.28-1,875.12

Finding the Fourth Proportional to 3,123.84, 4,685.28 and 1,875.12

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Solution

The fourth proportional to 3,123.84, 4,685.28 and 1,875.12 is: 2,812.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.84 : 4,685.28 = 1,875.12 : x
  2. Step 2: Convert to fraction form
    3,123.84/4,685.28 = 1,875.12/x
  3. Step 3: Cross multiply
    3,123.84x = 4,685.28 × 1,875.12
  4. Step 4: Simplify right side
    3,123.84x = 8,785,462.23
  5. Step 5: Solve for x
    x = 8,785,462.23/3,123.84
  6. Step 6: Final answer
    x = 2,812.39

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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.