Home / 19,108.10-28,666.22-7,421.28

Finding the Fourth Proportional to 19,108.10, 28,666.22 and 7,421.28

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Solution

The fourth proportional to 19,108.10, 28,666.22 and 7,421.28 is: 11,133.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,108.10 : 28,666.22 = 7,421.28 : x
  2. Step 2: Convert to fraction form
    19,108.10/28,666.22 = 7,421.28/x
  3. Step 3: Cross multiply
    19,108.10x = 28,666.22 × 7,421.28
  4. Step 4: Simplify right side
    19,108.10x = 212,740,008.06
  5. Step 5: Solve for x
    x = 212,740,008.06/19,108.10
  6. Step 6: Final answer
    x = 11,133.50

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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.