Home / 2,124.76-2,931.14-1,378.95

Finding the Fourth Proportional to 2,124.76, 2,931.14 and 1,378.95

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Solution

The fourth proportional to 2,124.76, 2,931.14 and 1,378.95 is: 1,902.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.76 : 2,931.14 = 1,378.95 : x
  2. Step 2: Convert to fraction form
    2,124.76/2,931.14 = 1,378.95/x
  3. Step 3: Cross multiply
    2,124.76x = 2,931.14 × 1,378.95
  4. Step 4: Simplify right side
    2,124.76x = 4,041,895.50
  5. Step 5: Solve for x
    x = 4,041,895.50/2,124.76
  6. Step 6: Final answer
    x = 1,902.28

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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.