Finding the Fourth Proportional to 13,128,964.86, 18,103,688.55 and 8,536,770.30
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Solution
The fourth proportional to 13,128,964.86, 18,103,688.55 and 8,536,770.30 is: 11,771,455.89
Step by Step Solution
- Step 1: Write the proportion equation
13,128,964.86 : 18,103,688.55 = 8,536,770.30 : x - Step 2: Convert to fraction form
13,128,964.86/18,103,688.55 = 8,536,770.30/x - Step 3: Cross multiply
13,128,964.86x = 18,103,688.55 × 8,536,770.30 - Step 4: Simplify right side
13,128,964.86x = 154,547,030,734,090.09 - Step 5: Solve for x
x = 154,547,030,734,090.09/13,128,964.86 - Step 6: Final answer
x = 11,771,455.89
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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.