Home / 38,420,686.31-53,020,967.79-21,017,031.71

Finding the Fourth Proportional to 38,420,686.31, 53,020,967.79 and 21,017,031.71

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Solution

The fourth proportional to 38,420,686.31, 53,020,967.79 and 21,017,031.71 is: 29,003,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,420,686.31 : 53,020,967.79 = 21,017,031.71 : x
  2. Step 2: Convert to fraction form
    38,420,686.31/53,020,967.79 = 21,017,031.71/x
  3. Step 3: Cross multiply
    38,420,686.31x = 53,020,967.79 × 21,017,031.71
  4. Step 4: Simplify right side
    38,420,686.31x = 1,114,343,361,077,783.50
  5. Step 5: Solve for x
    x = 1,114,343,361,077,783.50/38,420,686.31
  6. Step 6: Final answer
    x = 29,003,733.87

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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.