Home / 5,430.32-8,128.20-5,058.80

Finding the Fourth Proportional to 5,430.32, 8,128.20 and 5,058.80

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Solution

The fourth proportional to 5,430.32, 8,128.20 and 5,058.80 is: 7,572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.32 : 8,128.20 = 5,058.80 : x
  2. Step 2: Convert to fraction form
    5,430.32/8,128.20 = 5,058.80/x
  3. Step 3: Cross multiply
    5,430.32x = 8,128.20 × 5,058.80
  4. Step 4: Simplify right side
    5,430.32x = 41,118,938.16
  5. Step 5: Solve for x
    x = 41,118,938.16/5,430.32
  6. Step 6: Final answer
    x = 7,572.10

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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.