Home / 40,938.20-61,407.30-20,157.40

Finding the Fourth Proportional to 40,938.20, 61,407.30 and 20,157.40

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Solution

The fourth proportional to 40,938.20, 61,407.30 and 20,157.40 is: 30,236.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,938.20 : 61,407.30 = 20,157.40 : x
  2. Step 2: Convert to fraction form
    40,938.20/61,407.30 = 20,157.40/x
  3. Step 3: Cross multiply
    40,938.20x = 61,407.30 × 20,157.40
  4. Step 4: Simplify right side
    40,938.20x = 1,237,811,509.02
  5. Step 5: Solve for x
    x = 1,237,811,509.02/40,938.20
  6. Step 6: Final answer
    x = 30,236.10

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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.