Home / 12,740.90-19,128.36-12,592.67

Finding the Fourth Proportional to 12,740.90, 19,128.36 and 12,592.67

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Solution

The fourth proportional to 12,740.90, 19,128.36 and 12,592.67 is: 18,905.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,740.90 : 19,128.36 = 12,592.67 : x
  2. Step 2: Convert to fraction form
    12,740.90/19,128.36 = 12,592.67/x
  3. Step 3: Cross multiply
    12,740.90x = 19,128.36 × 12,592.67
  4. Step 4: Simplify right side
    12,740.90x = 240,877,125.12
  5. Step 5: Solve for x
    x = 240,877,125.12/12,740.90
  6. Step 6: Final answer
    x = 18,905.82

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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.