Home / 20,763.31-28,643.40-13,590.07

Finding the Fourth Proportional to 20,763.31, 28,643.40 and 13,590.07

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Solution

The fourth proportional to 20,763.31, 28,643.40 and 13,590.07 is: 18,747.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.31 : 28,643.40 = 13,590.07 : x
  2. Step 2: Convert to fraction form
    20,763.31/28,643.40 = 13,590.07/x
  3. Step 3: Cross multiply
    20,763.31x = 28,643.40 × 13,590.07
  4. Step 4: Simplify right side
    20,763.31x = 389,265,667.82
  5. Step 5: Solve for x
    x = 389,265,667.82/20,763.31
  6. Step 6: Final answer
    x = 18,747.77

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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.