Home / 28,011.81-38,656.30-15,436.56

Finding the Fourth Proportional to 28,011.81, 38,656.30 and 15,436.56

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Solution

The fourth proportional to 28,011.81, 38,656.30 and 15,436.56 is: 21,302.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011.81 : 38,656.30 = 15,436.56 : x
  2. Step 2: Convert to fraction form
    28,011.81/38,656.30 = 15,436.56/x
  3. Step 3: Cross multiply
    28,011.81x = 38,656.30 × 15,436.56
  4. Step 4: Simplify right side
    28,011.81x = 596,720,294.33
  5. Step 5: Solve for x
    x = 596,720,294.33/28,011.81
  6. Step 6: Final answer
    x = 21,302.45

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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.