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Finding the Fourth Proportional to 38,988,978.26, 53,804,803.12 and 21,348,996.51

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Solution

The fourth proportional to 38,988,978.26, 53,804,803.12 and 21,348,996.51 is: 29,461,622.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,988,978.26 : 53,804,803.12 = 21,348,996.51 : x
  2. Step 2: Convert to fraction form
    38,988,978.26/53,804,803.12 = 21,348,996.51/x
  3. Step 3: Cross multiply
    38,988,978.26x = 53,804,803.12 × 21,348,996.51
  4. Step 4: Simplify right side
    38,988,978.26x = 1,148,678,553,976,744.75
  5. Step 5: Solve for x
    x = 1,148,678,553,976,744.75/38,988,978.26
  6. Step 6: Final answer
    x = 29,461,622.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.