Home / 12,312.90-18,458.55-11,000.70

Finding the Fourth Proportional to 12,312.90, 18,458.55 and 11,000.70

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Solution

The fourth proportional to 12,312.90, 18,458.55 and 11,000.70 is: 16,491.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.90 : 18,458.55 = 11,000.70 : x
  2. Step 2: Convert to fraction form
    12,312.90/18,458.55 = 11,000.70/x
  3. Step 3: Cross multiply
    12,312.90x = 18,458.55 × 11,000.70
  4. Step 4: Simplify right side
    12,312.90x = 203,056,970.99
  5. Step 5: Solve for x
    x = 203,056,970.99/12,312.90
  6. Step 6: Final answer
    x = 16,491.40

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1.5x scale

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.