Home / 30,128.96-45,196.80-10,409.28

Finding the Fourth Proportional to 30,128.96, 45,196.80 and 10,409.28

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Solution

The fourth proportional to 30,128.96, 45,196.80 and 10,409.28 is: 15,615.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.96 : 45,196.80 = 10,409.28 : x
  2. Step 2: Convert to fraction form
    30,128.96/45,196.80 = 10,409.28/x
  3. Step 3: Cross multiply
    30,128.96x = 45,196.80 × 10,409.28
  4. Step 4: Simplify right side
    30,128.96x = 470,466,146.30
  5. Step 5: Solve for x
    x = 470,466,146.30/30,128.96
  6. Step 6: Final answer
    x = 15,615.08

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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.