Home / 12,456.99-18,688.64-4,139.33

Finding the Fourth Proportional to 12,456.99, 18,688.64 and 4,139.33

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Solution

The fourth proportional to 12,456.99, 18,688.64 and 4,139.33 is: 6,210.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.99 : 18,688.64 = 4,139.33 : x
  2. Step 2: Convert to fraction form
    12,456.99/18,688.64 = 4,139.33/x
  3. Step 3: Cross multiply
    12,456.99x = 18,688.64 × 4,139.33
  4. Step 4: Simplify right side
    12,456.99x = 77,358,334.07
  5. Step 5: Solve for x
    x = 77,358,334.07/12,456.99
  6. Step 6: Final answer
    x = 6,210.03

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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.