Home / 15,688.58-21,649.56-8,615.12

Finding the Fourth Proportional to 15,688.58, 21,649.56 and 8,615.12

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Solution

The fourth proportional to 15,688.58, 21,649.56 and 8,615.12 is: 11,888.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.58 : 21,649.56 = 8,615.12 : x
  2. Step 2: Convert to fraction form
    15,688.58/21,649.56 = 8,615.12/x
  3. Step 3: Cross multiply
    15,688.58x = 21,649.56 × 8,615.12
  4. Step 4: Simplify right side
    15,688.58x = 186,513,557.35
  5. Step 5: Solve for x
    x = 186,513,557.35/15,688.58
  6. Step 6: Final answer
    x = 11,888.49

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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.