Home / 30,389.40-45,584.10-21,009.60

Finding the Fourth Proportional to 30,389.40, 45,584.10 and 21,009.60

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Solution

The fourth proportional to 30,389.40, 45,584.10 and 21,009.60 is: 31,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,389.40 : 45,584.10 = 21,009.60 : x
  2. Step 2: Convert to fraction form
    30,389.40/45,584.10 = 21,009.60/x
  3. Step 3: Cross multiply
    30,389.40x = 45,584.10 × 21,009.60
  4. Step 4: Simplify right side
    30,389.40x = 957,703,707.36
  5. Step 5: Solve for x
    x = 957,703,707.36/30,389.40
  6. Step 6: Final answer
    x = 31,514.40

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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.