Home / 28,028.08-38,678.28-15,281.40

Finding the Fourth Proportional to 28,028.08, 38,678.28 and 15,281.40

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Solution

The fourth proportional to 28,028.08, 38,678.28 and 15,281.40 is: 21,088.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.08 : 38,678.28 = 15,281.40 : x
  2. Step 2: Convert to fraction form
    28,028.08/38,678.28 = 15,281.40/x
  3. Step 3: Cross multiply
    28,028.08x = 38,678.28 × 15,281.40
  4. Step 4: Simplify right side
    28,028.08x = 591,058,267.99
  5. Step 5: Solve for x
    x = 591,058,267.99/28,028.08
  6. Step 6: Final answer
    x = 21,088.08

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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.