Home / 28,030.47-38,681.55-15,283.75

Finding the Fourth Proportional to 28,030.47, 38,681.55 and 15,283.75

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Solution

The fourth proportional to 28,030.47, 38,681.55 and 15,283.75 is: 21,091.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,030.47 : 38,681.55 = 15,283.75 : x
  2. Step 2: Convert to fraction form
    28,030.47/38,681.55 = 15,283.75/x
  3. Step 3: Cross multiply
    28,030.47x = 38,681.55 × 15,283.75
  4. Step 4: Simplify right side
    28,030.47x = 591,199,115.64
  5. Step 5: Solve for x
    x = 591,199,115.64/28,030.47
  6. Step 6: Final answer
    x = 21,091.31

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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.