Home / 21,064.32-31,554.09-9,981.70

Finding the Fourth Proportional to 21,064.32, 31,554.09 and 9,981.70

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Solution

The fourth proportional to 21,064.32, 31,554.09 and 9,981.70 is: 14,952.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,064.32 : 31,554.09 = 9,981.70 : x
  2. Step 2: Convert to fraction form
    21,064.32/31,554.09 = 9,981.70/x
  3. Step 3: Cross multiply
    21,064.32x = 31,554.09 × 9,981.70
  4. Step 4: Simplify right side
    21,064.32x = 314,963,302.38
  5. Step 5: Solve for x
    x = 314,963,302.38/21,064.32
  6. Step 6: Final answer
    x = 14,952.46

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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.