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Finding the Fourth Proportional to 14,798.60, 20,421.20 and 8,830.21

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Solution

The fourth proportional to 14,798.60, 20,421.20 and 8,830.21 is: 12,185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,798.60 : 20,421.20 = 8,830.21 : x
  2. Step 2: Convert to fraction form
    14,798.60/20,421.20 = 8,830.21/x
  3. Step 3: Cross multiply
    14,798.60x = 20,421.20 × 8,830.21
  4. Step 4: Simplify right side
    14,798.60x = 180,323,440.30
  5. Step 5: Solve for x
    x = 180,323,440.30/14,798.60
  6. Step 6: Final answer
    x = 12,185.17

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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.