Home / 28,428.16-39,230.17-15,681.07

Finding the Fourth Proportional to 28,428.16, 39,230.17 and 15,681.07

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Solution

The fourth proportional to 28,428.16, 39,230.17 and 15,681.07 is: 21,639.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.16 : 39,230.17 = 15,681.07 : x
  2. Step 2: Convert to fraction form
    28,428.16/39,230.17 = 15,681.07/x
  3. Step 3: Cross multiply
    28,428.16x = 39,230.17 × 15,681.07
  4. Step 4: Simplify right side
    28,428.16x = 615,171,041.88
  5. Step 5: Solve for x
    x = 615,171,041.88/28,428.16
  6. Step 6: Final answer
    x = 21,639.50

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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.