Home / 13,189.40-19,784.10-12,606.20

Finding the Fourth Proportional to 13,189.40, 19,784.10 and 12,606.20

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Solution

The fourth proportional to 13,189.40, 19,784.10 and 12,606.20 is: 18,909.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.40 : 19,784.10 = 12,606.20 : x
  2. Step 2: Convert to fraction form
    13,189.40/19,784.10 = 12,606.20/x
  3. Step 3: Cross multiply
    13,189.40x = 19,784.10 × 12,606.20
  4. Step 4: Simplify right side
    13,189.40x = 249,402,321.42
  5. Step 5: Solve for x
    x = 249,402,321.42/13,189.40
  6. Step 6: Final answer
    x = 18,909.30

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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.