Home / 15,403.04-21,255.32-8,688.27

Finding the Fourth Proportional to 15,403.04, 21,255.32 and 8,688.27

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Solution

The fourth proportional to 15,403.04, 21,255.32 and 8,688.27 is: 11,989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.04 : 21,255.32 = 8,688.27 : x
  2. Step 2: Convert to fraction form
    15,403.04/21,255.32 = 8,688.27/x
  3. Step 3: Cross multiply
    15,403.04x = 21,255.32 × 8,688.27
  4. Step 4: Simplify right side
    15,403.04x = 184,671,915.66
  5. Step 5: Solve for x
    x = 184,671,915.66/15,403.04
  6. Step 6: Final answer
    x = 11,989.31

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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.