Home / 15,528.94-21,432.97-9,870.28

Finding the Fourth Proportional to 15,528.94, 21,432.97 and 9,870.28

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Solution

The fourth proportional to 15,528.94, 21,432.97 and 9,870.28 is: 13,622.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.94 : 21,432.97 = 9,870.28 : x
  2. Step 2: Convert to fraction form
    15,528.94/21,432.97 = 9,870.28/x
  3. Step 3: Cross multiply
    15,528.94x = 21,432.97 × 9,870.28
  4. Step 4: Simplify right side
    15,528.94x = 211,549,415.13
  5. Step 5: Solve for x
    x = 211,549,415.13/15,528.94
  6. Step 6: Final answer
    x = 13,622.91

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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.