Home / 15,688.13-21,649.64-8,615.03

Finding the Fourth Proportional to 15,688.13, 21,649.64 and 8,615.03

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Solution

The fourth proportional to 15,688.13, 21,649.64 and 8,615.03 is: 11,888.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.13 : 21,649.64 = 8,615.03 : x
  2. Step 2: Convert to fraction form
    15,688.13/21,649.64 = 8,615.03/x
  3. Step 3: Cross multiply
    15,688.13x = 21,649.64 × 8,615.03
  4. Step 4: Simplify right side
    15,688.13x = 186,512,146.77
  5. Step 5: Solve for x
    x = 186,512,146.77/15,688.13
  6. Step 6: Final answer
    x = 11,888.75

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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.