Home / 30,105.28-45,142.56-12,570.40

Finding the Fourth Proportional to 30,105.28, 45,142.56 and 12,570.40

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Solution

The fourth proportional to 30,105.28, 45,142.56 and 12,570.40 is: 18,849.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,105.28 : 45,142.56 = 12,570.40 : x
  2. Step 2: Convert to fraction form
    30,105.28/45,142.56 = 12,570.40/x
  3. Step 3: Cross multiply
    30,105.28x = 45,142.56 × 12,570.40
  4. Step 4: Simplify right side
    30,105.28x = 567,460,036.22
  5. Step 5: Solve for x
    x = 567,460,036.22/30,105.28
  6. Step 6: Final answer
    x = 18,849.19

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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.