Home / 42,678.09-63,962.06-20,445.21

Finding the Fourth Proportional to 42,678.09, 63,962.06 and 20,445.21

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Solution

The fourth proportional to 42,678.09, 63,962.06 and 20,445.21 is: 30,641.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,678.09 : 63,962.06 = 20,445.21 : x
  2. Step 2: Convert to fraction form
    42,678.09/63,962.06 = 20,445.21/x
  3. Step 3: Cross multiply
    42,678.09x = 63,962.06 × 20,445.21
  4. Step 4: Simplify right side
    42,678.09x = 1,307,717,646.51
  5. Step 5: Solve for x
    x = 1,307,717,646.51/42,678.09
  6. Step 6: Final answer
    x = 30,641.43

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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.