Home / 15,685.43-21,645.93-8,612.31

Finding the Fourth Proportional to 15,685.43, 21,645.93 and 8,612.31

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Solution

The fourth proportional to 15,685.43, 21,645.93 and 8,612.31 is: 11,885.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.43 : 21,645.93 = 8,612.31 : x
  2. Step 2: Convert to fraction form
    15,685.43/21,645.93 = 8,612.31/x
  3. Step 3: Cross multiply
    15,685.43x = 21,645.93 × 8,612.31
  4. Step 4: Simplify right side
    15,685.43x = 186,421,378.23
  5. Step 5: Solve for x
    x = 186,421,378.23/15,685.43
  6. Step 6: Final answer
    x = 11,885.00

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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.