Home / 5,257.20-7,885.80-1,970.40

Finding the Fourth Proportional to 5,257.20, 7,885.80 and 1,970.40

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Solution

The fourth proportional to 5,257.20, 7,885.80 and 1,970.40 is: 2,955.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,257.20 : 7,885.80 = 1,970.40 : x
  2. Step 2: Convert to fraction form
    5,257.20/7,885.80 = 1,970.40/x
  3. Step 3: Cross multiply
    5,257.20x = 7,885.80 × 1,970.40
  4. Step 4: Simplify right side
    5,257.20x = 15,538,180.32
  5. Step 5: Solve for x
    x = 15,538,180.32/5,257.20
  6. Step 6: Final answer
    x = 2,955.60

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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.