Home / 8,782.08-12,113.76-5,640.48

Finding the Fourth Proportional to 8,782.08, 12,113.76 and 5,640.48

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Solution

The fourth proportional to 8,782.08, 12,113.76 and 5,640.48 is: 7,780.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.08 : 12,113.76 = 5,640.48 : x
  2. Step 2: Convert to fraction form
    8,782.08/12,113.76 = 5,640.48/x
  3. Step 3: Cross multiply
    8,782.08x = 12,113.76 × 5,640.48
  4. Step 4: Simplify right side
    8,782.08x = 68,327,421.00
  5. Step 5: Solve for x
    x = 68,327,421.00/8,782.08
  6. Step 6: Final answer
    x = 7,780.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.