Home / 39,400.72-54,393.06-30,428.08

Finding the Fourth Proportional to 39,400.72, 54,393.06 and 30,428.08

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Solution

The fourth proportional to 39,400.72, 54,393.06 and 30,428.08 is: 42,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,400.72 : 54,393.06 = 30,428.08 : x
  2. Step 2: Convert to fraction form
    39,400.72/54,393.06 = 30,428.08/x
  3. Step 3: Cross multiply
    39,400.72x = 54,393.06 × 30,428.08
  4. Step 4: Simplify right side
    39,400.72x = 1,655,076,381.12
  5. Step 5: Solve for x
    x = 1,655,076,381.12/39,400.72
  6. Step 6: Final answer
    x = 42,006.25

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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.