Home / 12,528.99-18,795.60-4,209.80

Finding the Fourth Proportional to 12,528.99, 18,795.60 and 4,209.80

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Solution

The fourth proportional to 12,528.99, 18,795.60 and 4,209.80 is: 6,315.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528.99 : 18,795.60 = 4,209.80 : x
  2. Step 2: Convert to fraction form
    12,528.99/18,795.60 = 4,209.80/x
  3. Step 3: Cross multiply
    12,528.99x = 18,795.60 × 4,209.80
  4. Step 4: Simplify right side
    12,528.99x = 79,125,622.90
  5. Step 5: Solve for x
    x = 79,125,622.90/12,528.99
  6. Step 6: Final answer
    x = 6,315.40

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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.