Finding the Fourth Proportional to 15,439,733.20, 21,306,420.66 and 8,913,142
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Solution
The fourth proportional to 15,439,733.20, 21,306,420.66 and 8,913,142 is: 12,299,898.61
Step by Step Solution
- Step 1: Write the proportion equation
15,439,733.20 : 21,306,420.66 = 8,913,142 : x - Step 2: Convert to fraction form
15,439,733.20/21,306,420.66 = 8,913,142/x - Step 3: Cross multiply
15,439,733.20x = 21,306,420.66 × 8,913,142 - Step 4: Simplify right side
15,439,733.20x = 189,907,152,854,313.72 - Step 5: Solve for x
x = 189,907,152,854,313.72/15,439,733.20 - Step 6: Final answer
x = 12,299,898.61
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1.5x scale
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.