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Finding the Fourth Proportional to 47,266.76, 70,913.93 and 13,987.71

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Solution

The fourth proportional to 47,266.76, 70,913.93 and 13,987.71 is: 20,985.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,266.76 : 70,913.93 = 13,987.71 : x
  2. Step 2: Convert to fraction form
    47,266.76/70,913.93 = 13,987.71/x
  3. Step 3: Cross multiply
    47,266.76x = 70,913.93 × 13,987.71
  4. Step 4: Simplify right side
    47,266.76x = 991,923,417.86
  5. Step 5: Solve for x
    x = 991,923,417.86/47,266.76
  6. Step 6: Final answer
    x = 20,985.64

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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.