Home / 20,513.79-28,307.48-13,427.91

Finding the Fourth Proportional to 20,513.79, 28,307.48 and 13,427.91

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Solution

The fourth proportional to 20,513.79, 28,307.48 and 13,427.91 is: 18,529.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.79 : 28,307.48 = 13,427.91 : x
  2. Step 2: Convert to fraction form
    20,513.79/28,307.48 = 13,427.91/x
  3. Step 3: Cross multiply
    20,513.79x = 28,307.48 × 13,427.91
  4. Step 4: Simplify right side
    20,513.79x = 380,110,226.63
  5. Step 5: Solve for x
    x = 380,110,226.63/20,513.79
  6. Step 6: Final answer
    x = 18,529.50

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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.