Home / 31,985.10-47,977.65-20,904.30

Finding the Fourth Proportional to 31,985.10, 47,977.65 and 20,904.30

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Solution

The fourth proportional to 31,985.10, 47,977.65 and 20,904.30 is: 31,356.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,985.10 : 47,977.65 = 20,904.30 : x
  2. Step 2: Convert to fraction form
    31,985.10/47,977.65 = 20,904.30/x
  3. Step 3: Cross multiply
    31,985.10x = 47,977.65 × 20,904.30
  4. Step 4: Simplify right side
    31,985.10x = 1,002,939,188.90
  5. Step 5: Solve for x
    x = 1,002,939,188.90/31,985.10
  6. Step 6: Final answer
    x = 31,356.45

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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.