Home / 40,430.43-55,786.59-30,720.15

Finding the Fourth Proportional to 40,430.43, 55,786.59 and 30,720.15

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Solution

The fourth proportional to 40,430.43, 55,786.59 and 30,720.15 is: 42,388.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,430.43 : 55,786.59 = 30,720.15 : x
  2. Step 2: Convert to fraction form
    40,430.43/55,786.59 = 30,720.15/x
  3. Step 3: Cross multiply
    40,430.43x = 55,786.59 × 30,720.15
  4. Step 4: Simplify right side
    40,430.43x = 1,713,772,412.79
  5. Step 5: Solve for x
    x = 1,713,772,412.79/40,430.43
  6. Step 6: Final answer
    x = 42,388.18

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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.