Home / 13,139.60-19,709.40-6,897.20

Finding the Fourth Proportional to 13,139.60, 19,709.40 and 6,897.20

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Solution

The fourth proportional to 13,139.60, 19,709.40 and 6,897.20 is: 10,345.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.60 : 19,709.40 = 6,897.20 : x
  2. Step 2: Convert to fraction form
    13,139.60/19,709.40 = 6,897.20/x
  3. Step 3: Cross multiply
    13,139.60x = 19,709.40 × 6,897.20
  4. Step 4: Simplify right side
    13,139.60x = 135,939,673.68
  5. Step 5: Solve for x
    x = 135,939,673.68/13,139.60
  6. Step 6: Final answer
    x = 10,345.80

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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.