Home / 21,005,111.80-31,554,906.90-20,202,045.40

Finding the Fourth Proportional to 21,005,111.80, 31,554,906.90 and 20,202,045.40

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Solution

The fourth proportional to 21,005,111.80, 31,554,906.90 and 20,202,045.40 is: 30,348,501.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,111.80 : 31,554,906.90 = 20,202,045.40 : x
  2. Step 2: Convert to fraction form
    21,005,111.80/31,554,906.90 = 20,202,045.40/x
  3. Step 3: Cross multiply
    21,005,111.80x = 31,554,906.90 × 20,202,045.40
  4. Step 4: Simplify right side
    21,005,111.80x = 637,473,661,786,573.12
  5. Step 5: Solve for x
    x = 637,473,661,786,573.12/21,005,111.80
  6. Step 6: Final answer
    x = 30,348,501.25

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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.