Home / 21,084.04-31,637.10-13,686.76

Finding the Fourth Proportional to 21,084.04, 31,637.10 and 13,686.76

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Solution

The fourth proportional to 21,084.04, 31,637.10 and 13,686.76 is: 20,537.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.04 : 31,637.10 = 13,686.76 : x
  2. Step 2: Convert to fraction form
    21,084.04/31,637.10 = 13,686.76/x
  3. Step 3: Cross multiply
    21,084.04x = 31,637.10 × 13,686.76
  4. Step 4: Simplify right side
    21,084.04x = 433,009,394.80
  5. Step 5: Solve for x
    x = 433,009,394.80/21,084.04
  6. Step 6: Final answer
    x = 20,537.31

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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.