Home / 8,678.08-13,000.80-4,290.40

Finding the Fourth Proportional to 8,678.08, 13,000.80 and 4,290.40

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Solution

The fourth proportional to 8,678.08, 13,000.80 and 4,290.40 is: 6,427.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.08 : 13,000.80 = 4,290.40 : x
  2. Step 2: Convert to fraction form
    8,678.08/13,000.80 = 4,290.40/x
  3. Step 3: Cross multiply
    8,678.08x = 13,000.80 × 4,290.40
  4. Step 4: Simplify right side
    8,678.08x = 55,778,632.32
  5. Step 5: Solve for x
    x = 55,778,632.32/8,678.08
  6. Step 6: Final answer
    x = 6,427.53

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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.