Home / 30,663.12-45,984.96-13,128.24

Finding the Fourth Proportional to 30,663.12, 45,984.96 and 13,128.24

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Solution

The fourth proportional to 30,663.12, 45,984.96 and 13,128.24 is: 19,688.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,663.12 : 45,984.96 = 13,128.24 : x
  2. Step 2: Convert to fraction form
    30,663.12/45,984.96 = 13,128.24/x
  3. Step 3: Cross multiply
    30,663.12x = 45,984.96 × 13,128.24
  4. Step 4: Simplify right side
    30,663.12x = 603,701,591.27
  5. Step 5: Solve for x
    x = 603,701,591.27/30,663.12
  6. Step 6: Final answer
    x = 19,688.20

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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.