Home / 21,061,386.70-31,592,080.05-18,457,981.90

Finding the Fourth Proportional to 21,061,386.70, 31,592,080.05 and 18,457,981.90

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Solution

The fourth proportional to 21,061,386.70, 31,592,080.05 and 18,457,981.90 is: 27,686,972.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061,386.70 : 31,592,080.05 = 18,457,981.90 : x
  2. Step 2: Convert to fraction form
    21,061,386.70/31,592,080.05 = 18,457,981.90/x
  3. Step 3: Cross multiply
    21,061,386.70x = 31,592,080.05 × 18,457,981.90
  4. Step 4: Simplify right side
    21,061,386.70x = 583,126,041,746,251
  5. Step 5: Solve for x
    x = 583,126,041,746,251/21,061,386.70
  6. Step 6: Final answer
    x = 27,686,972.85

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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.