Home / 21,281.32-31,921.98-10,887.40

Finding the Fourth Proportional to 21,281.32, 31,921.98 and 10,887.40

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Solution

The fourth proportional to 21,281.32, 31,921.98 and 10,887.40 is: 16,331.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.32 : 31,921.98 = 10,887.40 : x
  2. Step 2: Convert to fraction form
    21,281.32/31,921.98 = 10,887.40/x
  3. Step 3: Cross multiply
    21,281.32x = 31,921.98 × 10,887.40
  4. Step 4: Simplify right side
    21,281.32x = 347,547,365.05
  5. Step 5: Solve for x
    x = 347,547,365.05/21,281.32
  6. Step 6: Final answer
    x = 16,331.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.