Home / 12,488.28-18,815.70-11,303.76

Finding the Fourth Proportional to 12,488.28, 18,815.70 and 11,303.76

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Solution

The fourth proportional to 12,488.28, 18,815.70 and 11,303.76 is: 17,031.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.28 : 18,815.70 = 11,303.76 : x
  2. Step 2: Convert to fraction form
    12,488.28/18,815.70 = 11,303.76/x
  3. Step 3: Cross multiply
    12,488.28x = 18,815.70 × 11,303.76
  4. Step 4: Simplify right side
    12,488.28x = 212,688,157.03
  5. Step 5: Solve for x
    x = 212,688,157.03/12,488.28
  6. Step 6: Final answer
    x = 17,031.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.