Home / 31,820.10-47,730.15-8,127.60

Finding the Fourth Proportional to 31,820.10, 47,730.15 and 8,127.60

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Solution

The fourth proportional to 31,820.10, 47,730.15 and 8,127.60 is: 12,191.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,820.10 : 47,730.15 = 8,127.60 : x
  2. Step 2: Convert to fraction form
    31,820.10/47,730.15 = 8,127.60/x
  3. Step 3: Cross multiply
    31,820.10x = 47,730.15 × 8,127.60
  4. Step 4: Simplify right side
    31,820.10x = 387,931,567.14
  5. Step 5: Solve for x
    x = 387,931,567.14/31,820.10
  6. Step 6: Final answer
    x = 12,191.40

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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.