Home / 20,800.30-28,703.98-11,368.93

Finding the Fourth Proportional to 20,800.30, 28,703.98 and 11,368.93

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Solution

The fourth proportional to 20,800.30, 28,703.98 and 11,368.93 is: 15,688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.30 : 28,703.98 = 11,368.93 : x
  2. Step 2: Convert to fraction form
    20,800.30/28,703.98 = 11,368.93/x
  3. Step 3: Cross multiply
    20,800.30x = 28,703.98 × 11,368.93
  4. Step 4: Simplify right side
    20,800.30x = 326,333,539.34
  5. Step 5: Solve for x
    x = 326,333,539.34/20,800.30
  6. Step 6: Final answer
    x = 15,688.89

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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.