Home / 20,320.05-28,058.97-12,779.00

Finding the Fourth Proportional to 20,320.05, 28,058.97 and 12,779.00

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Solution

The fourth proportional to 20,320.05, 28,058.97 and 12,779.00 is: 17,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.05 : 28,058.97 = 12,779.00 : x
  2. Step 2: Convert to fraction form
    20,320.05/28,058.97 = 12,779.00/x
  3. Step 3: Cross multiply
    20,320.05x = 28,058.97 × 12,779.00
  4. Step 4: Simplify right side
    20,320.05x = 358,565,437.34
  5. Step 5: Solve for x
    x = 358,565,437.34/20,320.05
  6. Step 6: Final answer
    x = 17,645.89

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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.