Home / 15,495.48-21,383.93-8,421.90

Finding the Fourth Proportional to 15,495.48, 21,383.93 and 8,421.90

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Solution

The fourth proportional to 15,495.48, 21,383.93 and 8,421.90 is: 11,622.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.48 : 21,383.93 = 8,421.90 : x
  2. Step 2: Convert to fraction form
    15,495.48/21,383.93 = 8,421.90/x
  3. Step 3: Cross multiply
    15,495.48x = 21,383.93 × 8,421.90
  4. Step 4: Simplify right side
    15,495.48x = 180,093,320.07
  5. Step 5: Solve for x
    x = 180,093,320.07/15,495.48
  6. Step 6: Final answer
    x = 11,622.31

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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.