Home / 21,210.80-31,816.04-8,890.16

Finding the Fourth Proportional to 21,210.80, 31,816.04 and 8,890.16

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Solution

The fourth proportional to 21,210.80, 31,816.04 and 8,890.16 is: 13,335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.80 : 31,816.04 = 8,890.16 : x
  2. Step 2: Convert to fraction form
    21,210.80/31,816.04 = 8,890.16/x
  3. Step 3: Cross multiply
    21,210.80x = 31,816.04 × 8,890.16
  4. Step 4: Simplify right side
    21,210.80x = 282,849,686.17
  5. Step 5: Solve for x
    x = 282,849,686.17/21,210.80
  6. Step 6: Final answer
    x = 13,335.17

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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.