Home / 30,973.78-42,747.65-18,398.58

Finding the Fourth Proportional to 30,973.78, 42,747.65 and 18,398.58

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Solution

The fourth proportional to 30,973.78, 42,747.65 and 18,398.58 is: 25,392.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,973.78 : 42,747.65 = 18,398.58 : x
  2. Step 2: Convert to fraction form
    30,973.78/42,747.65 = 18,398.58/x
  3. Step 3: Cross multiply
    30,973.78x = 42,747.65 × 18,398.58
  4. Step 4: Simplify right side
    30,973.78x = 786,496,058.34
  5. Step 5: Solve for x
    x = 786,496,058.34/30,973.78
  6. Step 6: Final answer
    x = 25,392.32

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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.