Home / 20,430.72-30,637.44-6,386.98

Finding the Fourth Proportional to 20,430.72, 30,637.44 and 6,386.98

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Solution

The fourth proportional to 20,430.72, 30,637.44 and 6,386.98 is: 9,577.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.72 : 30,637.44 = 6,386.98 : x
  2. Step 2: Convert to fraction form
    20,430.72/30,637.44 = 6,386.98/x
  3. Step 3: Cross multiply
    20,430.72x = 30,637.44 × 6,386.98
  4. Step 4: Simplify right side
    20,430.72x = 195,680,677.84
  5. Step 5: Solve for x
    x = 195,680,677.84/20,430.72
  6. Step 6: Final answer
    x = 9,577.77

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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.