Home / 13,128.60-19,692.90-8,981.40

Finding the Fourth Proportional to 13,128.60, 19,692.90 and 8,981.40

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Solution

The fourth proportional to 13,128.60, 19,692.90 and 8,981.40 is: 13,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.60 : 19,692.90 = 8,981.40 : x
  2. Step 2: Convert to fraction form
    13,128.60/19,692.90 = 8,981.40/x
  3. Step 3: Cross multiply
    13,128.60x = 19,692.90 × 8,981.40
  4. Step 4: Simplify right side
    13,128.60x = 176,869,812.06
  5. Step 5: Solve for x
    x = 176,869,812.06/13,128.60
  6. Step 6: Final answer
    x = 13,472.10

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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.