Home / 28,678.15-39,577.17-15,931.35

Finding the Fourth Proportional to 28,678.15, 39,577.17 and 15,931.35

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Solution

The fourth proportional to 28,678.15, 39,577.17 and 15,931.35 is: 21,986.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.15 : 39,577.17 = 15,931.35 : x
  2. Step 2: Convert to fraction form
    28,678.15/39,577.17 = 15,931.35/x
  3. Step 3: Cross multiply
    28,678.15x = 39,577.17 × 15,931.35
  4. Step 4: Simplify right side
    28,678.15x = 630,517,807.02
  5. Step 5: Solve for x
    x = 630,517,807.02/28,678.15
  6. Step 6: Final answer
    x = 21,986.00

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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.