Home / 30,478.01-42,064.11-18,539.03

Finding the Fourth Proportional to 30,478.01, 42,064.11 and 18,539.03

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Solution

The fourth proportional to 30,478.01, 42,064.11 and 18,539.03 is: 25,586.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,478.01 : 42,064.11 = 18,539.03 : x
  2. Step 2: Convert to fraction form
    30,478.01/42,064.11 = 18,539.03/x
  3. Step 3: Cross multiply
    30,478.01x = 42,064.11 × 18,539.03
  4. Step 4: Simplify right side
    30,478.01x = 779,827,586.89
  5. Step 5: Solve for x
    x = 779,827,586.89/30,478.01
  6. Step 6: Final answer
    x = 25,586.57

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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.