Home / 38,421.10-53,017.50-21,423.70

Finding the Fourth Proportional to 38,421.10, 53,017.50 and 21,423.70

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Solution

The fourth proportional to 38,421.10, 53,017.50 and 21,423.70 is: 29,562.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,421.10 : 53,017.50 = 21,423.70 : x
  2. Step 2: Convert to fraction form
    38,421.10/53,017.50 = 21,423.70/x
  3. Step 3: Cross multiply
    38,421.10x = 53,017.50 × 21,423.70
  4. Step 4: Simplify right side
    38,421.10x = 1,135,831,014.75
  5. Step 5: Solve for x
    x = 1,135,831,014.75/38,421.10
  6. Step 6: Final answer
    x = 29,562.69

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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.