Home / 15,390.48-21,238.86-8,316.90

Finding the Fourth Proportional to 15,390.48, 21,238.86 and 8,316.90

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Solution

The fourth proportional to 15,390.48, 21,238.86 and 8,316.90 is: 11,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.48 : 21,238.86 = 8,316.90 : x
  2. Step 2: Convert to fraction form
    15,390.48/21,238.86 = 8,316.90/x
  3. Step 3: Cross multiply
    15,390.48x = 21,238.86 × 8,316.90
  4. Step 4: Simplify right side
    15,390.48x = 176,641,474.73
  5. Step 5: Solve for x
    x = 176,641,474.73/15,390.48
  6. Step 6: Final answer
    x = 11,477.32

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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.