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Finding the Fourth Proportional to 14,556.80, 21,835.20 and 13,430.40

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Solution

The fourth proportional to 14,556.80, 21,835.20 and 13,430.40 is: 20,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,556.80 : 21,835.20 = 13,430.40 : x
  2. Step 2: Convert to fraction form
    14,556.80/21,835.20 = 13,430.40/x
  3. Step 3: Cross multiply
    14,556.80x = 21,835.20 × 13,430.40
  4. Step 4: Simplify right side
    14,556.80x = 293,255,470.08
  5. Step 5: Solve for x
    x = 293,255,470.08/14,556.80
  6. Step 6: Final answer
    x = 20,145.60

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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.