Home / 12,688.08-19,017.96-5,290.08

Finding the Fourth Proportional to 12,688.08, 19,017.96 and 5,290.08

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Solution

The fourth proportional to 12,688.08, 19,017.96 and 5,290.08 is: 7,929.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.08 : 19,017.96 = 5,290.08 : x
  2. Step 2: Convert to fraction form
    12,688.08/19,017.96 = 5,290.08/x
  3. Step 3: Cross multiply
    12,688.08x = 19,017.96 × 5,290.08
  4. Step 4: Simplify right side
    12,688.08x = 100,606,529.84
  5. Step 5: Solve for x
    x = 100,606,529.84/12,688.08
  6. Step 6: Final answer
    x = 7,929.22

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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.