Home / 31,513.80-47,270.70-13,985.40

Finding the Fourth Proportional to 31,513.80, 47,270.70 and 13,985.40

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Solution

The fourth proportional to 31,513.80, 47,270.70 and 13,985.40 is: 20,978.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,513.80 : 47,270.70 = 13,985.40 : x
  2. Step 2: Convert to fraction form
    31,513.80/47,270.70 = 13,985.40/x
  3. Step 3: Cross multiply
    31,513.80x = 47,270.70 × 13,985.40
  4. Step 4: Simplify right side
    31,513.80x = 661,099,647.78
  5. Step 5: Solve for x
    x = 661,099,647.78/31,513.80
  6. Step 6: Final answer
    x = 20,978.10

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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.