Home / 20,862.05-28,788.95-11,430.41

Finding the Fourth Proportional to 20,862.05, 28,788.95 and 11,430.41

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Solution

The fourth proportional to 20,862.05, 28,788.95 and 11,430.41 is: 15,773.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.05 : 28,788.95 = 11,430.41 : x
  2. Step 2: Convert to fraction form
    20,862.05/28,788.95 = 11,430.41/x
  3. Step 3: Cross multiply
    20,862.05x = 28,788.95 × 11,430.41
  4. Step 4: Simplify right side
    20,862.05x = 329,069,386.60
  5. Step 5: Solve for x
    x = 329,069,386.60/20,862.05
  6. Step 6: Final answer
    x = 15,773.59

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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.