Home / 30,655.07-42,308.15-18,721.34

Finding the Fourth Proportional to 30,655.07, 42,308.15 and 18,721.34

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Solution

The fourth proportional to 30,655.07, 42,308.15 and 18,721.34 is: 25,837.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,655.07 : 42,308.15 = 18,721.34 : x
  2. Step 2: Convert to fraction form
    30,655.07/42,308.15 = 18,721.34/x
  3. Step 3: Cross multiply
    30,655.07x = 42,308.15 × 18,721.34
  4. Step 4: Simplify right side
    30,655.07x = 792,064,955.77
  5. Step 5: Solve for x
    x = 792,064,955.77/30,655.07
  6. Step 6: Final answer
    x = 25,837.98

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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.