Home / 65,431.45-98,147.21-21,058.20

Finding the Fourth Proportional to 65,431.45, 98,147.21 and 21,058.20

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Solution

The fourth proportional to 65,431.45, 98,147.21 and 21,058.20 is: 31,587.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,431.45 : 98,147.21 = 21,058.20 : x
  2. Step 2: Convert to fraction form
    65,431.45/98,147.21 = 21,058.20/x
  3. Step 3: Cross multiply
    65,431.45x = 98,147.21 × 21,058.20
  4. Step 4: Simplify right side
    65,431.45x = 2,066,803,590.78
  5. Step 5: Solve for x
    x = 2,066,803,590.78/65,431.45
  6. Step 6: Final answer
    x = 31,587.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.