Home / 15,354.63-21,189.47-8,640.36

Finding the Fourth Proportional to 15,354.63, 21,189.47 and 8,640.36

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Solution

The fourth proportional to 15,354.63, 21,189.47 and 8,640.36 is: 11,923.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354.63 : 21,189.47 = 8,640.36 : x
  2. Step 2: Convert to fraction form
    15,354.63/21,189.47 = 8,640.36/x
  3. Step 3: Cross multiply
    15,354.63x = 21,189.47 × 8,640.36
  4. Step 4: Simplify right side
    15,354.63x = 183,084,605.81
  5. Step 5: Solve for x
    x = 183,084,605.81/15,354.63
  6. Step 6: Final answer
    x = 11,923.74

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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.