Home / 12,688.20-19,030.20-4,254.60

Finding the Fourth Proportional to 12,688.20, 19,030.20 and 4,254.60

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Solution

The fourth proportional to 12,688.20, 19,030.20 and 4,254.60 is: 6,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.20 : 19,030.20 = 4,254.60 : x
  2. Step 2: Convert to fraction form
    12,688.20/19,030.20 = 4,254.60/x
  3. Step 3: Cross multiply
    12,688.20x = 19,030.20 × 4,254.60
  4. Step 4: Simplify right side
    12,688.20x = 80,965,888.92
  5. Step 5: Solve for x
    x = 80,965,888.92/12,688.20
  6. Step 6: Final answer
    x = 6,381.20

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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.