Home / 12,811.61-19,223.36-5,417.80

Finding the Fourth Proportional to 12,811.61, 19,223.36 and 5,417.80

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Solution

The fourth proportional to 12,811.61, 19,223.36 and 5,417.80 is: 8,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.61 : 19,223.36 = 5,417.80 : x
  2. Step 2: Convert to fraction form
    12,811.61/19,223.36 = 5,417.80/x
  3. Step 3: Cross multiply
    12,811.61x = 19,223.36 × 5,417.80
  4. Step 4: Simplify right side
    12,811.61x = 104,148,319.81
  5. Step 5: Solve for x
    x = 104,148,319.81/12,811.61
  6. Step 6: Final answer
    x = 8,129.21

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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.