Home / 15,693.07-21,656.58-8,619.64

Finding the Fourth Proportional to 15,693.07, 21,656.58 and 8,619.64

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Solution

The fourth proportional to 15,693.07, 21,656.58 and 8,619.64 is: 11,895.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.07 : 21,656.58 = 8,619.64 : x
  2. Step 2: Convert to fraction form
    15,693.07/21,656.58 = 8,619.64/x
  3. Step 3: Cross multiply
    15,693.07x = 21,656.58 × 8,619.64
  4. Step 4: Simplify right side
    15,693.07x = 186,671,814.95
  5. Step 5: Solve for x
    x = 186,671,814.95/15,693.07
  6. Step 6: Final answer
    x = 11,895.18

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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.