Home / 13,325.15-19,987.70-12,513.20

Finding the Fourth Proportional to 13,325.15, 19,987.70 and 12,513.20

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Solution

The fourth proportional to 13,325.15, 19,987.70 and 12,513.20 is: 18,769.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,325.15 : 19,987.70 = 12,513.20 : x
  2. Step 2: Convert to fraction form
    13,325.15/19,987.70 = 12,513.20/x
  3. Step 3: Cross multiply
    13,325.15x = 19,987.70 × 12,513.20
  4. Step 4: Simplify right side
    13,325.15x = 250,109,925.14
  5. Step 5: Solve for x
    x = 250,109,925.14/13,325.15
  6. Step 6: Final answer
    x = 18,769.76

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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.