Home / 38,913.55-53,703.32-21,688.60

Finding the Fourth Proportional to 38,913.55, 53,703.32 and 21,688.60

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Solution

The fourth proportional to 38,913.55, 53,703.32 and 21,688.60 is: 29,931.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,913.55 : 53,703.32 = 21,688.60 : x
  2. Step 2: Convert to fraction form
    38,913.55/53,703.32 = 21,688.60/x
  3. Step 3: Cross multiply
    38,913.55x = 53,703.32 × 21,688.60
  4. Step 4: Simplify right side
    38,913.55x = 1,164,749,826.15
  5. Step 5: Solve for x
    x = 1,164,749,826.15/38,913.55
  6. Step 6: Final answer
    x = 29,931.73

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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.