Home / 31,587.84-43,590.18-18,157.20

Finding the Fourth Proportional to 31,587.84, 43,590.18 and 18,157.20

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Solution

The fourth proportional to 31,587.84, 43,590.18 and 18,157.20 is: 25,056.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,587.84 : 43,590.18 = 18,157.20 : x
  2. Step 2: Convert to fraction form
    31,587.84/43,590.18 = 18,157.20/x
  3. Step 3: Cross multiply
    31,587.84x = 43,590.18 × 18,157.20
  4. Step 4: Simplify right side
    31,587.84x = 791,475,616.30
  5. Step 5: Solve for x
    x = 791,475,616.30/31,587.84
  6. Step 6: Final answer
    x = 25,056.34

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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.