Home / 28,888.81-39,865.30-18,139.25

Finding the Fourth Proportional to 28,888.81, 39,865.30 and 18,139.25

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Solution

The fourth proportional to 28,888.81, 39,865.30 and 18,139.25 is: 25,031.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,888.81 : 39,865.30 = 18,139.25 : x
  2. Step 2: Convert to fraction form
    28,888.81/39,865.30 = 18,139.25/x
  3. Step 3: Cross multiply
    28,888.81x = 39,865.30 × 18,139.25
  4. Step 4: Simplify right side
    28,888.81x = 723,126,697.34
  5. Step 5: Solve for x
    x = 723,126,697.34/28,888.81
  6. Step 6: Final answer
    x = 25,031.38

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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.