Home / 19,875.35-27,430.43-11,491.85

Finding the Fourth Proportional to 19,875.35, 27,430.43 and 11,491.85

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Solution

The fourth proportional to 19,875.35, 27,430.43 and 11,491.85 is: 15,860.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,875.35 : 27,430.43 = 11,491.85 : x
  2. Step 2: Convert to fraction form
    19,875.35/27,430.43 = 11,491.85/x
  3. Step 3: Cross multiply
    19,875.35x = 27,430.43 × 11,491.85
  4. Step 4: Simplify right side
    19,875.35x = 315,226,398.11
  5. Step 5: Solve for x
    x = 315,226,398.11/19,875.35
  6. Step 6: Final answer
    x = 15,860.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.