Home / 21,248,775.80-31,881,036.90-8,478,445.40

Finding the Fourth Proportional to 21,248,775.80, 31,881,036.90 and 8,478,445.40

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Solution

The fourth proportional to 21,248,775.80, 31,881,036.90 and 8,478,445.40 is: 12,720,809.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248,775.80 : 31,881,036.90 = 8,478,445.40 : x
  2. Step 2: Convert to fraction form
    21,248,775.80/31,881,036.90 = 8,478,445.40/x
  3. Step 3: Cross multiply
    21,248,775.80x = 31,881,036.90 × 8,478,445.40
  4. Step 4: Simplify right side
    21,248,775.80x = 270,301,630,652,035.25
  5. Step 5: Solve for x
    x = 270,301,630,652,035.25/21,248,775.80
  6. Step 6: Final answer
    x = 12,720,809.57

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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.