Home / 10,947.80-16,437.90-8,485.40

Finding the Fourth Proportional to 10,947.80, 16,437.90 and 8,485.40

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Solution

The fourth proportional to 10,947.80, 16,437.90 and 8,485.40 is: 12,740.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,947.80 : 16,437.90 = 8,485.40 : x
  2. Step 2: Convert to fraction form
    10,947.80/16,437.90 = 8,485.40/x
  3. Step 3: Cross multiply
    10,947.80x = 16,437.90 × 8,485.40
  4. Step 4: Simplify right side
    10,947.80x = 139,482,156.66
  5. Step 5: Solve for x
    x = 139,482,156.66/10,947.80
  6. Step 6: Final answer
    x = 12,740.66

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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.