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Finding the Fourth Proportional to 20,967.60, 28,935.72 and 12,014.04

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Solution

The fourth proportional to 20,967.60, 28,935.72 and 12,014.04 is: 16,579.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.60 : 28,935.72 = 12,014.04 : x
  2. Step 2: Convert to fraction form
    20,967.60/28,935.72 = 12,014.04/x
  3. Step 3: Cross multiply
    20,967.60x = 28,935.72 × 12,014.04
  4. Step 4: Simplify right side
    20,967.60x = 347,634,897.51
  5. Step 5: Solve for x
    x = 347,634,897.51/20,967.60
  6. Step 6: Final answer
    x = 16,579.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.