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Finding the Fourth Proportional to 47,281.20, 70,921.80 and 14,006.40

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Solution

The fourth proportional to 47,281.20, 70,921.80 and 14,006.40 is: 21,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,281.20 : 70,921.80 = 14,006.40 : x
  2. Step 2: Convert to fraction form
    47,281.20/70,921.80 = 14,006.40/x
  3. Step 3: Cross multiply
    47,281.20x = 70,921.80 × 14,006.40
  4. Step 4: Simplify right side
    47,281.20x = 993,359,099.52
  5. Step 5: Solve for x
    x = 993,359,099.52/47,281.20
  6. Step 6: Final answer
    x = 21,009.60

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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.