Home / 2,124.45-2,931.90-1,239.93

Finding the Fourth Proportional to 2,124.45, 2,931.90 and 1,239.93

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Solution

The fourth proportional to 2,124.45, 2,931.90 and 1,239.93 is: 1,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.45 : 2,931.90 = 1,239.93 : x
  2. Step 2: Convert to fraction form
    2,124.45/2,931.90 = 1,239.93/x
  3. Step 3: Cross multiply
    2,124.45x = 2,931.90 × 1,239.93
  4. Step 4: Simplify right side
    2,124.45x = 3,635,350.77
  5. Step 5: Solve for x
    x = 3,635,350.77/2,124.45
  6. Step 6: Final answer
    x = 1,711.20

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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.