Home / 8,258.40-12,387.60-3,870.72

Finding the Fourth Proportional to 8,258.40, 12,387.60 and 3,870.72

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Solution

The fourth proportional to 8,258.40, 12,387.60 and 3,870.72 is: 5,806.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,258.40 : 12,387.60 = 3,870.72 : x
  2. Step 2: Convert to fraction form
    8,258.40/12,387.60 = 3,870.72/x
  3. Step 3: Cross multiply
    8,258.40x = 12,387.60 × 3,870.72
  4. Step 4: Simplify right side
    8,258.40x = 47,948,931.07
  5. Step 5: Solve for x
    x = 47,948,931.07/8,258.40
  6. Step 6: Final answer
    x = 5,806.08

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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.