Home / 30,968.68-42,754.51-20,389.07

Finding the Fourth Proportional to 30,968.68, 42,754.51 and 20,389.07

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Solution

The fourth proportional to 30,968.68, 42,754.51 and 20,389.07 is: 28,148.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.68 : 42,754.51 = 20,389.07 : x
  2. Step 2: Convert to fraction form
    30,968.68/42,754.51 = 20,389.07/x
  3. Step 3: Cross multiply
    30,968.68x = 42,754.51 × 20,389.07
  4. Step 4: Simplify right side
    30,968.68x = 871,724,381.49
  5. Step 5: Solve for x
    x = 871,724,381.49/30,968.68
  6. Step 6: Final answer
    x = 28,148.59

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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.