Home / 21,405,232-29,539,220.16-12,820,528

Finding the Fourth Proportional to 21,405,232, 29,539,220.16 and 12,820,528

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Solution

The fourth proportional to 21,405,232, 29,539,220.16 and 12,820,528 is: 17,692,328.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405,232 : 29,539,220.16 = 12,820,528 : x
  2. Step 2: Convert to fraction form
    21,405,232/29,539,220.16 = 12,820,528/x
  3. Step 3: Cross multiply
    21,405,232x = 29,539,220.16 × 12,820,528
  4. Step 4: Simplify right side
    21,405,232x = 378,708,399,159,444.50
  5. Step 5: Solve for x
    x = 378,708,399,159,444.50/21,405,232
  6. Step 6: Final answer
    x = 17,692,328.64

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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.