Home / 39,142.40-53,953.60-30,630.08

Finding the Fourth Proportional to 39,142.40, 53,953.60 and 30,630.08

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Solution

The fourth proportional to 39,142.40, 53,953.60 and 30,630.08 is: 42,220.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,142.40 : 53,953.60 = 30,630.08 : x
  2. Step 2: Convert to fraction form
    39,142.40/53,953.60 = 30,630.08/x
  3. Step 3: Cross multiply
    39,142.40x = 53,953.60 × 30,630.08
  4. Step 4: Simplify right side
    39,142.40x = 1,652,603,084.29
  5. Step 5: Solve for x
    x = 1,652,603,084.29/39,142.40
  6. Step 6: Final answer
    x = 42,220.28

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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.