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Finding the Fourth Proportional to 40,647.96, 60,977.76 and 12,570.20

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Solution

The fourth proportional to 40,647.96, 60,977.76 and 12,570.20 is: 18,857.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,647.96 : 60,977.76 = 12,570.20 : x
  2. Step 2: Convert to fraction form
    40,647.96/60,977.76 = 12,570.20/x
  3. Step 3: Cross multiply
    40,647.96x = 60,977.76 × 12,570.20
  4. Step 4: Simplify right side
    40,647.96x = 766,502,638.75
  5. Step 5: Solve for x
    x = 766,502,638.75/40,647.96
  6. Step 6: Final answer
    x = 18,857.10

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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.