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Finding the Fourth Proportional to 14,980.40, 20,663.78 and 8,926.60

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Solution

The fourth proportional to 14,980.40, 20,663.78 and 8,926.60 is: 12,313.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,980.40 : 20,663.78 = 8,926.60 : x
  2. Step 2: Convert to fraction form
    14,980.40/20,663.78 = 8,926.60/x
  3. Step 3: Cross multiply
    14,980.40x = 20,663.78 × 8,926.60
  4. Step 4: Simplify right side
    14,980.40x = 184,457,298.55
  5. Step 5: Solve for x
    x = 184,457,298.55/14,980.40
  6. Step 6: Final answer
    x = 12,313.24

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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.