Home / 30,570.90-42,196.73-19,815.45

Finding the Fourth Proportional to 30,570.90, 42,196.73 and 19,815.45

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Solution

The fourth proportional to 30,570.90, 42,196.73 and 19,815.45 is: 27,351.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,570.90 : 42,196.73 = 19,815.45 : x
  2. Step 2: Convert to fraction form
    30,570.90/42,196.73 = 19,815.45/x
  3. Step 3: Cross multiply
    30,570.90x = 42,196.73 × 19,815.45
  4. Step 4: Simplify right side
    30,570.90x = 836,147,094.40
  5. Step 5: Solve for x
    x = 836,147,094.40/30,570.90
  6. Step 6: Final answer
    x = 27,351.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.