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Finding the Fourth Proportional to 47,859.60, 71,790.12 and 12,798.84

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Solution

The fourth proportional to 47,859.60, 71,790.12 and 12,798.84 is: 19,198.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,859.60 : 71,790.12 = 12,798.84 : x
  2. Step 2: Convert to fraction form
    47,859.60/71,790.12 = 12,798.84/x
  3. Step 3: Cross multiply
    47,859.60x = 71,790.12 × 12,798.84
  4. Step 4: Simplify right side
    47,859.60x = 918,830,259.46
  5. Step 5: Solve for x
    x = 918,830,259.46/47,859.60
  6. Step 6: Final answer
    x = 19,198.45

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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.