Home / 20,430.81-30,630.65-10,563.80

Finding the Fourth Proportional to 20,430.81, 30,630.65 and 10,563.80

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Solution

The fourth proportional to 20,430.81, 30,630.65 and 10,563.80 is: 15,837.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.81 : 30,630.65 = 10,563.80 : x
  2. Step 2: Convert to fraction form
    20,430.81/30,630.65 = 10,563.80/x
  3. Step 3: Cross multiply
    20,430.81x = 30,630.65 × 10,563.80
  4. Step 4: Simplify right side
    20,430.81x = 323,575,854.50
  5. Step 5: Solve for x
    x = 323,575,854.50/20,430.81
  6. Step 6: Final answer
    x = 15,837.64

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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.