Home / 10,235.10-15,389.10-8,631.30

Finding the Fourth Proportional to 10,235.10, 15,389.10 and 8,631.30

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Solution

The fourth proportional to 10,235.10, 15,389.10 and 8,631.30 is: 12,977.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,235.10 : 15,389.10 = 8,631.30 : x
  2. Step 2: Convert to fraction form
    10,235.10/15,389.10 = 8,631.30/x
  3. Step 3: Cross multiply
    10,235.10x = 15,389.10 × 8,631.30
  4. Step 4: Simplify right side
    10,235.10x = 132,827,938.83
  5. Step 5: Solve for x
    x = 132,827,938.83/10,235.10
  6. Step 6: Final answer
    x = 12,977.69

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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.