Home / 10,947.60-16,421.40-3,157.20

Finding the Fourth Proportional to 10,947.60, 16,421.40 and 3,157.20

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Solution

The fourth proportional to 10,947.60, 16,421.40 and 3,157.20 is: 4,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.60 : 16,421.40 = 3,157.20 : x
  2. Step 2: Convert to fraction form
    10,947.60/16,421.40 = 3,157.20/x
  3. Step 3: Cross multiply
    10,947.60x = 16,421.40 × 3,157.20
  4. Step 4: Simplify right side
    10,947.60x = 51,845,644.08
  5. Step 5: Solve for x
    x = 51,845,644.08/10,947.60
  6. Step 6: Final answer
    x = 4,735.80

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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.