Home / 19,129.12-28,688.40-13,566.08

Finding the Fourth Proportional to 19,129.12, 28,688.40 and 13,566.08

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Solution

The fourth proportional to 19,129.12, 28,688.40 and 13,566.08 is: 20,345.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,129.12 : 28,688.40 = 13,566.08 : x
  2. Step 2: Convert to fraction form
    19,129.12/28,688.40 = 13,566.08/x
  3. Step 3: Cross multiply
    19,129.12x = 28,688.40 × 13,566.08
  4. Step 4: Simplify right side
    19,129.12x = 389,189,129.47
  5. Step 5: Solve for x
    x = 389,189,129.47/19,129.12
  6. Step 6: Final answer
    x = 20,345.38

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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.