Home / 12,985.15-19,465.40-4,213.93

Finding the Fourth Proportional to 12,985.15, 19,465.40 and 4,213.93

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Solution

The fourth proportional to 12,985.15, 19,465.40 and 4,213.93 is: 6,316.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.15 : 19,465.40 = 4,213.93 : x
  2. Step 2: Convert to fraction form
    12,985.15/19,465.40 = 4,213.93/x
  3. Step 3: Cross multiply
    12,985.15x = 19,465.40 × 4,213.93
  4. Step 4: Simplify right side
    12,985.15x = 82,025,811.95
  5. Step 5: Solve for x
    x = 82,025,811.95/12,985.15
  6. Step 6: Final answer
    x = 6,316.89

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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.