Home / 12,988.08-19,475.64-4,220.64

Finding the Fourth Proportional to 12,988.08, 19,475.64 and 4,220.64

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Solution

The fourth proportional to 12,988.08, 19,475.64 and 4,220.64 is: 6,328.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.08 : 19,475.64 = 4,220.64 : x
  2. Step 2: Convert to fraction form
    12,988.08/19,475.64 = 4,220.64/x
  3. Step 3: Cross multiply
    12,988.08x = 19,475.64 × 4,220.64
  4. Step 4: Simplify right side
    12,988.08x = 82,199,665.21
  5. Step 5: Solve for x
    x = 82,199,665.21/12,988.08
  6. Step 6: Final answer
    x = 6,328.85

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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.