Home / 25,688.80-38,529.60-8,160.40

Finding the Fourth Proportional to 25,688.80, 38,529.60 and 8,160.40

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Solution

The fourth proportional to 25,688.80, 38,529.60 and 8,160.40 is: 12,239.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,688.80 : 38,529.60 = 8,160.40 : x
  2. Step 2: Convert to fraction form
    25,688.80/38,529.60 = 8,160.40/x
  3. Step 3: Cross multiply
    25,688.80x = 38,529.60 × 8,160.40
  4. Step 4: Simplify right side
    25,688.80x = 314,416,947.84
  5. Step 5: Solve for x
    x = 314,416,947.84/25,688.80
  6. Step 6: Final answer
    x = 12,239.46

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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.