Home / 19,779.36-27,325.16-12,989.49

Finding the Fourth Proportional to 19,779.36, 27,325.16 and 12,989.49

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Solution

The fourth proportional to 19,779.36, 27,325.16 and 12,989.49 is: 17,944.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,779.36 : 27,325.16 = 12,989.49 : x
  2. Step 2: Convert to fraction form
    19,779.36/27,325.16 = 12,989.49/x
  3. Step 3: Cross multiply
    19,779.36x = 27,325.16 × 12,989.49
  4. Step 4: Simplify right side
    19,779.36x = 354,939,892.57
  5. Step 5: Solve for x
    x = 354,939,892.57/19,779.36
  6. Step 6: Final answer
    x = 17,944.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.