Home / 7,877.20-10,870.64-4,340.40

Finding the Fourth Proportional to 7,877.20, 10,870.64 and 4,340.40

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Solution

The fourth proportional to 7,877.20, 10,870.64 and 4,340.40 is: 5,989.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.20 : 10,870.64 = 4,340.40 : x
  2. Step 2: Convert to fraction form
    7,877.20/10,870.64 = 4,340.40/x
  3. Step 3: Cross multiply
    7,877.20x = 10,870.64 × 4,340.40
  4. Step 4: Simplify right side
    7,877.20x = 47,182,925.86
  5. Step 5: Solve for x
    x = 47,182,925.86/7,877.20
  6. Step 6: Final answer
    x = 5,989.81

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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.