Home / 21,386.90-29,503.67-13,835.60

Finding the Fourth Proportional to 21,386.90, 29,503.67 and 13,835.60

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Solution

The fourth proportional to 21,386.90, 29,503.67 and 13,835.60 is: 19,086.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,386.90 : 29,503.67 = 13,835.60 : x
  2. Step 2: Convert to fraction form
    21,386.90/29,503.67 = 13,835.60/x
  3. Step 3: Cross multiply
    21,386.90x = 29,503.67 × 13,835.60
  4. Step 4: Simplify right side
    21,386.90x = 408,200,976.65
  5. Step 5: Solve for x
    x = 408,200,976.65/21,386.90
  6. Step 6: Final answer
    x = 19,086.50

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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.