Home / 15,688.13-21,648.21-8,614.40

Finding the Fourth Proportional to 15,688.13, 21,648.21 and 8,614.40

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Solution

The fourth proportional to 15,688.13, 21,648.21 and 8,614.40 is: 11,887.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.13 : 21,648.21 = 8,614.40 : x
  2. Step 2: Convert to fraction form
    15,688.13/21,648.21 = 8,614.40/x
  3. Step 3: Cross multiply
    15,688.13x = 21,648.21 × 8,614.40
  4. Step 4: Simplify right side
    15,688.13x = 186,486,340.22
  5. Step 5: Solve for x
    x = 186,486,340.22/15,688.13
  6. Step 6: Final answer
    x = 11,887.10

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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.